Important!
1.Headphones can work very poorly with some models of smartphones: the sound is constantly interrupted.
2.These andany other Bluetooth headphones, even expensive for $ 100-300 unsuitable for games on Android, for example, in PUBG: a very large sound delay.
Read more about all this in the spoiler "Problem Solving".
----------------------------------

Which seller is better to buy?
Everything regarding prices, delivery and sellers is discussed in a separate topic.Purchase. This topic is only for discussion of the headphones themselves.

How do I know if I have the original?
Fakes exist and are very similar to the original.Hereexamples, attributes and their sellers are collected. You can not check on the Xiaomi website by code.How does forgery

What are the differences between Chinese and global versions?
- globallikeis always on the case "MI", the Chinese may be "MI" or "Redmi", that will fall
- different official name: "Redmi AirDots" and "Mi True Wireless Earbuds Basic", respectively, Bluetooth-device names, too, such
- the language of the inscriptions on the back of the box and instructions: on the Chinese all the Chinese on the global there are inscriptions in Russian,instructionalso
Other technical differencesnot, the sound is the same.
The price on the global higher because, presumably, it is higher in the purchase of Xiaomi.

What is the difference between Xiaomi Mi True Wireless Earbuds (ZBW4420GL) and Xiaomi Mi True Wireless EarbudsBasic(ZBW4480GL)
The first - a global version of a very different, older model: they are more white, with touch-sensitive buttons and AAC codec. discussed inseparate topic

What is the sound quality?
Obviously, this is a very subjective and individual question.
Most agree that the sound is very good considering the low price (and you do not forget about it).
Also wrote that a lot of high frequencies. But you can get used to it. Or, in the equalizer of the firmware / player, raise the low frequencies.
If there is no equalizer (so, on MIUI, it does not work for BT headphones), try the applicationEqualizer fxorEqualizer pieif you have android 9 and up.
Do not forget to include the global mode settings (not available for Pie), ie the sound change even on YouTube.
For iPhone / iPad useHS Player, It does have an equalizer.
And there were also reports that changing ear cushions / other fastening in the earLittlechange sound, experiment.
Alsowrotethat the sound can differ even between two pairs, i.e. what will fall.
Although, from the codecs there is only SBC, it can be raised to the level of the notorious AptX:more

Is there any background noise?
Yes, small. It is noticeable only on quiet tracks or if you turn off the music. After 5-10 seconds it disappears due to the lack of a "useful signal".

Are they loud?
Yes. At 100% volume to listen uncomfortable. And while the sound is significantly distorted.
The volume can be increased even more in the equalizer of the player / firmware / third-party equalizer (see above), evenly raising all frequencies.
Important: the volume level is different for different devices.

What is their insulation?
Good, you can listen to the subway. Of course, subject to the appropriate size ambushur and dense installation in the ears.
Please be careful outside.

Do they fall out of ears?
No, because they are mounted in the ear canal.
You can jump, run, tilt and shake your head. Therefore, headphones are suitable for running or gym.
But the anatomy of the ears is different for everyone. Even the left and right ear may be different. If anything, use larger ear pads.

Are they strongly felt in the ear?
The first time may be unusual, but then they are invisible. Moreover, they weigh only 4 grams each.

Davit whether in your ear while you press the button? Is it loud clicks?
If the earphone is pressed tightly to the ear, then there is no discomfort from pressing, little effort is needed.
But sometimes it is temporarily pressed deeper than distorting the sound. There may be differences depending on the anatomy of your ears. The solution isbypass puncture
The click is over, heard loudly. In general, the button can be used.

Is it waterproof?
Splash protection only. But, as usual, it is better not to risk it. Important: the case is not protected.
The manufacturer claims class / degree of protection IPx4, which means:
"The device will not suffer when exposed to a large number of sprays directed from different sides (for example, rain, drops from the shower)"

Is there a sound delay?
There is no disturbing delay when playing music / movies / YouTube from a smartphone -test video
But it may depend on the device used and even the application.
In games (PUBG), the delay can be ~ 0.8 s and thus interfere very much. Nothing to do with it. More details in the "Problem Solving" spoiler.
Also, usually with a computer a little delay in music there. In games like normal.
Remember that sound transmission via Bluetooth in any case creates a delay: with the SBC codec, it is 150-250 ms, plus 20-80 ms for buffering.

How long do they work on one charge?
Stated up to 4 hours, it is in practice.
With a new battery (do not forget about wear) - about 3:30 hours of music / conversation at a volume of 40-60%.
With movies / YouTube where less sounds can and all 4.
If you use only one earphone, it will last for 6-6.5 hours of music at a volume of 40-50%. Plus stay another by the same amount.
A fully charged case will definitely be able to recharge them 3 times and a little more, the duration of one charge is 1:10 h.
In total, if the headphones were charged earlier, it turns out 15-16 hours without connecting to an outlet.

How quickly does the phone discharge when using them?
itcomplex issue, considering the different capacities of the batteries and their wear. If the phone is not used, then the discharge is approximately 2-4% per hour.

What is the quality of the microphone? Is there noise reduction?
Not good quality. Interlocutor sure to notice what you are talking on a headset, even in silence. Noise heard around better than the voice. However, someone has no problems.
Possible causes: poor-quality microphone, its location in the body, cover the hole the tragus of the ear or due to noise reduction.
Hole enlargementdid not help
Recently, it was discovered that the sound is slightly better (less "bubnyavosti") if the only use for the left earpiece, ie when it is connected separately.
As a solution, you can remove the right earpiece and talking into his microphone. Turn it off (use the phone) can not.
Noise stated, its working principle is simply noise filtering, and not using the second microphone. Turn off the impossible.

When talking, is there sound in both headphones?
Yes. By the way, only the right microphone is used.

Can I use only one earphone?
Yes. More details in the next spoiler.

As they work with the iPhone / iPad?
Usually work:more

Is it true that the kit does not have a cable / charging? How then to charge?
Yes. It is assumed that you will charge the case with charging from a smartphone. Please note that the connector here is the old microUSB, not the new USB Type C.

Are they suitable for cycling?
Positive reviews:1, 2, 3, 4, 5
But two users (1, 2) there are constant interrupts. The reason is unknown: marriage or incompatibility with the phone.
And, I think, it is clear that, due to the sound insulation, it is very dangerous to drive in them on the roads.

My device only supports Bluetooth 1.2 / 2/3 / 4. Will they work?
Yes, there is backward compatibility.
They work even with the old "dialers". Double pressing the button on them causes voice dialing. Connection Code: 0000
Important: Devices with lower version2.1 + EDRhave a very high consumption and headphones will be discharged much faster.
Also note that contrary to conventional wisdom BT 5.0does not improve autonomy in any way.

Are they in white or other color?
No, only in black. In white there is a past generation calledXiaomi Mi AirDotsThey are quite different: different sound, touch and larger.
Case color can be changedbuying a case. Please note that at least with ribbed edgesnot very high quality

- What ear pads in the kit?
- whether the parties will approach?
3 sizes: small (height 0.85 cm, diameter 1.05 cm), medium (0.95 / 1.2 cm), large (1 / 1.3 cm). The thickness of all is the same. Headphones are already wearing medium ones.
For the most part, they are not suitable for other headphones: they either do not hold, or interfere with the closure of the case cover. Foamalso. Butthese onesIt went perfectly.
Or you can use inappropriate, butmodify the casemeddling.
Landing dimensions are indicated.here

What can I do with the button on the earpiece?
- On on / off him
- Play / Pause almost any player
- Call the voice assistant:Google Assistant, Siri, Alice
Actions can be reassigned to something else, for example, switching tracks (available only on Android, rootnot need)
Read more in the second spoiler "Usage Questions".

How fast do they connect?
The whole process of connecting between yourself and the phone takes up to 5 seconds - you just have time to put them on.
The connection works even if the phone screen is off.

Will the headphones work normally with a fitness bracelet / smart watch?
Probably yes. But all possible combinations of the phone and the device are not taken into account.
Please note that on Samsung due to a bug in their firmware there may be a deterioration in sound quality:more. Such exactly: S8 +, A70, J7 2016
Can help shutdown option "Play. Sound 2 Device."

Is it convenient to lie in them?
Unfortunately no. When the head is pressed on the side of the button, it either stops the music or completely turns off the headphones.

Are they suitable for the PlayStation 3/4?
Note that verotyano will prevent sound delays.
PS3: Yes. If anything, hereoff instruction. Connection Code: 0000
PS4: By default, no (like any others). Perhaps earn via USB Bluetooth dongle.

Sound events in Chinese or English?
There are no voices at all, only sound signals.

Does the LED blink while playing music?
Not.

Is extraction from the ear recognized?
Not. Taking them out, you can just in passing press the button that puts the player on pause.

Where to see their amplitude-frequency response (AFC)?
Here

How to switch tracks / change the volume with the button?

I have written on the case "MI" / "Redmi". What is the difference between them?
No difference. To whom it comes across. So on the Chinese version, globallikethe whole "MI".
There was an assumption that only the owners with the inscription “MI” supposedly cracked the headphones and the case is quickly scratched, and the “Redmi” version has stronger plastic.
But it is disprovedsurvey results

I have a Chinese / global version. What is the difference between them?
- globallikeis always on the case "MI", the Chinese may be "MI" or "Redmi", that will fall
- different official name: "Redmi AirDots" and "Mi True Wireless Earbuds Basic", respectively, Bluetooth-device names, too, such
- the language of the inscriptions on the back of the box and instructions: on the Chinese all the Chinese on the global there are inscriptions in Russian,instructionalso
Other technical differencesnot, the sound is the same.

How to pair with a phone / laptop?
If you have just opened the box: Lower headphone remove foil from the contacts.
After putting them in the case, they should glow red. If not, connect the case to any charge.
1. Remove both earbuds from the case (the sequence does not matter)
2. Headphones need to connect with each other: frequent blinking white on both replaced by slow on the right
3. Turn on Bluetooth on your smartphone, find the right earpiece in the list.(Redmi AirDots_R or Mi True Wireless EBs Basic_R)and connect to it
Note: the right earpiece is the main one, i.e. the sound first arrives at it and is further relayed to the left.

How to use headphones separately?
Remove only one earpiece from the case, perform the pairing as described above.
The ending of the device name will be different:_L- left_R- right.
Then you can remove the second and connect to another device.
Listening to such a "mono-mode" adds about 2 hours of battery, i.e., up to 6-6.5 hours hours on the volume of 40-50%.
Important: the left earpiece is always searched longer, for at first he tries to find the right one. Wait for slow flashing white after 20 seconds from switching on.
You can reduce this time if you include the earphone is the case. It is necessary to hold the button for 5 seconds (a source)

Can I use them with multiple devices at once?
Yes, but not at the same time (partialworkaround)
Pair with the right devices and unplug the headphones from one, and then connect them to another.

How to turn them on and off (restart)?
Simply put and remove from the case: the presence or absence of charging controls the power of the headphones.
Of course, for this to always work, the case must be charged.
Or you can hold the button on any earphone for 5 seconds, and the other will automatically turn off: the LEDs will be red for 2 seconds.
It is necessary to turn on each separately by holding the button for 2 seconds until the white display appears for 2 seconds.

Is there an automatic shutdown?
Yes, with no connection for 5 minutes.

Which earpiece should be removed / turned on first?
It does not matter, they will still find each other.
The main thing is that no more than 20 seconds elapse between the extraction of both, for then the left one stops the search and becomes available for connecting to the phone.

How to improve the sound?
Experiment with the EQ of your firmware / player. It is advisable to install a third-partyEqualizer fxorEqualizer pieif you have android 9 and up.
In its settings, you can enable global mode (not available for Pie), i.e. the sound will even change on YouTube.
For iPhone / iPad useHS Player, It does have an equalizer.
By the way, although there is only SBC from the codecs, it can be raised to the level of the notorious AptX:more

How do I know if I have the original?
Fakes exist and are very similar to the original.Hereexamples, attributes and their sellers are collected. You can not check on the Xiaomi website by code.How does forgery.

How do you know of Bluetooth-module manufacturer?
Instruction

How do I know the date of manufacture?
She pointed to a white label behind the box: the number of species2019.07

Why on the box Product Code Global (ZBW4480GL), and on a case - Chinese (TWSEJ04LS)?
Why - is unknown, but it's ok, younotfake.

How to reset?
Instruction

How to use the button when talking on the phone?
- answer any call - short press
- reject any call - hold for 1 second
- switch the sound to the phone / headphones - hold for 1 second
- switch between interlocutors ("lines") - double tap
- turn off / turn on the microphone - double tap (not displayed on the phone)
- end the current call - short press

What does the LED indication on headphones mean?
- glows red in the case - charging in progress
- 1 minute glows white in a case - charging is now complete
- does not glow in the case - full charge
- often flashes white - search for a second headphone (up to 20 seconds) or loss of connection with the phone (up to 2 minutes)
- slowly blinking white - no connection to the phone
- not lit - off or connected to the phone
- note: no indication during playback, incoming call or low battery

What does the LED display on the case mean?
Red (white is not) indicator is positioned just below the slot to open the cover (a photo). The off invisible.
- glows when charging - case is charging
- does not glow when charging - full charge
- if the LED is blinking - youfake

How to know the charge level of the headphones?
Starting with version 7, Android shows it in Bluetooth settings, as well as near the icon in the status bar.
If your firmware is no such functionality, use the appBatonRuth himnot need (translated APK to other icons here )
The application shows the level in the notification in the "curtain". In its settings, change the polling frequency and how to display information.
Please note that on some phones it may lead to inability to connect.
Since in stereo mode the phone connects only to the right earpiece, only its charge is shown.
To find out the charge of the left you need to hide the right one in the case and temporarily connect to the left one.
Solution for iOS, Need dzheybreyk.
The charge will not be displayed if the headphone is disconnected calls profile.
Note: The "step" charge gauge - each 10%, that's fine.

How do I know the level of charge of the case?
Alas, it is not reported by the LED.
Learn about the complete discharge of the case is possible only by the fact that the headphones themselves became connected when invested in it or if they do not glow red.

Headphones are charged at 100%, but still some time glow red / white in a case (charged)
This is normal.

Can I charge the case when it charged the headphones?
Yes.

How to clean the mesh from sulfur?
Instruction

A battery does not wear out quickly if you constantly keep the headphones in the briefcase? Well, because there is a constant recharging
Unlikely. As if such use is implied by the manufacturer.
In addition, there is evidence that for some fall charge the headphones, they are automatically recharged.
After all, it is necessary to monitor the LEDs over time.
And in general, everything is the same battery will wear out sooner or later. At that price bother, IMHO, too.

- Can they be connected at the same time as an independent unit? (Function is to Samsung and other phones with BT 5.0)
- Can I connect two pairs to one phone?
Yes, but the sound will be mono: a mixture of left and right channels is transmitted to each earpiece.
Thus headphones have worked for 6-6.5 hours instead of 4 on the volume of 40-50%.
On Samsung joins insettingsBluetooth

Can I replace the connector in a case on the USB-C?
Yes, details:1, 2, 3

Are third-party ear cushions fit?
For the most part, they are not suitable for other headphones: they either do not hold, or interfere with the closure of the case cover. Foamalso. Butthese onesIt went perfectly.
Or you can use inappropriate, butmodify the casemeddling.
Landing dimensions are indicated.here

How can they be connected to devices without Bluetooth?
Usingsuch an adapter

Is it possible to charge a case by charging as much as 2 amperes? What about a power bank? A charger with QC 2.0 / 3.0 will not hurt the case?
Cananycharging. The current in the charger - this one that it canpay(In contrast to voltage, constant value).
And any deviceberetas he needs, and therefore damage the "large number of amp" you can not.
The fully discharged state case consumes 200 mAh: This should be enough to pauerbank started giving charge.
Fast charging does not hurt, because it turns on with the support of both devices, it is not here.

How to figure out which headphone is left and right?
The letter is written on the edge: L (Left) - left, R (Right) - right.

How long does the case and headphones charge?
- Case: 2:10 h with discharged headphones
- Case: 1:40 h without headphones
- Headphones, if discharged in stereo mode: left - 0:40 h, right - 1:10 h
This happens because the right one is discharged faster than the left due to a greater load: after the right is turned off, 40-50% of the charge remains on the left.

How long are the headphones waiting for connection when it is lost?
2 minutes, after which they go into accessibility mode for searching (another 5 minutes).

How to use them with two devices without reconnecting?
Partialworkaround

How to change voice assistant?
Settings>Applications>Google / Yandex / Xiao Ai / * other now working *>Open by default>Delete default settings
The next time the assistant is called, the question will be what to use.

How to make the volume even higher?
In the firmware equalizer / third-party equalizer (Equalizer fxorEqualizer pieif you have Android 9 and above) / player evenly raise all frequencies.
Do not forget to enable global mode in the settings (not available for Pie). Equalizers also usually have a sound enhancement effect.
For iPhone / iPad useHS Player, It does have an equalizer.

I do not want to use headphones as a headset for calls
In the Bluetooth settings near the headphones, click the gear / arrow and turn off the "Calls".
But it will not auto-connect and display the charge level.

Is it possible to make the left earphone the main one?
Yes, but it turns out like the only chance: see.hereandhere

What is the pairing code?
0000

Is it possible to install in case a larger capacity battery?
No, there is no room.

Is it possible to disable the clicking sound of buttons / alert?
Not.

Can I disable the buttons?
Not.

Is it possible somehow to voice the caller's name?
Not.

Is it possible to mute the microphone in the headphones when speaking and use the phone?
Not.

Can I turn off noise reduction during the conversation?
Not.

Is there a formal application?
Not.

Is there a firmware update headphones?
Not.

Where can I get an official instruction?
Hereinstruction from the global version in numerous languages, including Russian.

Here are collected almost all the problems that were mentioned in the topic.
But do not be scared of their large number, your copy may well not have a single one.
Remember, the forum is usually written only about problems in search of their solutions.
----------------------------------

- Headphones do not connect with each other, but work separately
- Out of sync between channels
- Very long sound delay
- Very low volume
- * Any software problem *
Reset the headphones

Sound is interrupted (sometimes / constantly on one / both headphones / when the phone is in your back pocket / backpack / cycling / only in the city, etc.)

Most audio delay on smarfton games
These andany otherBluetooth headphones, even expensive for $ 100-300unsuitablefor games on Android, for example, in PUBG.
Nothing can be done with this, so on all headphones in conjunction with Android, because it increases the natural delay to 0.5 ... 0.8 seconds, which makes it very difficult to play.
This is due tocomplicated processsound processing. The problem is in the operating system, not in the headphones.
How they behave on Apple devices is unknown.
Delays in games are not only on AirPods in conjunction with the iPhone / iPad, because they work together in a special, optimized way.
In the computer games like the delay allowed.

One / both headphones in the case no longer glowing red
They just fully charged.
By the way, the left one charges faster due to the smaller load and therefore the discharge: after turning off the right one, there is still 40-50% left on it.

One earphone is constantly flashing red and white in the case, it does not work outside of it.
The fault is probablycharge controllerorthe battery itself. Trythis, this, thisandthis. Orreplace battery

One earphone is no longer on the phone (usually after a reset)
Since this is clearly a software problem, the earphone must somehow reboot the de-energized. The easiest way to put in the freezer, but it is harmful to the battery.
How long - depends on the current charge. Just check from time to time.Examplesuccessful decision.
Or tryclose contactsor disassemble, unhook and re-solder the wiring from the battery.

The headset always glows dim red and does not react to anything
There is no solution. Freezer to quickly discharge the battery, which means rebootingdid not helpMay disconnect the wiring from the battery will be more effective.

One earphone not included
Probably just a marriage. There is no solution.

One earphone included but will not emit any sounds
Probably,the posting was dropped

Headphones do not connect with each other, reset helps only until shutdown
Try to take them out of the case and place them as close as possible.

Headphones began to crack / a piece of plastic fell off
It seems to be used a low-quality or thin plastic. Or is it a constructive defect, because chips usually have latches. It happens at an average of 17% of the owners.
There was an assumption that this problem was allegedly only for owners with the inscription "MI", and the "Redmi" version has stronger plastic. But it is disprovedpoll
The assumption that the first batches also badoprovorgnuto poll
Possible solution: pour the problem area with epoxy resin orsuper glue with soda

Unpleasant, uneven sticking in the ears, laying, "vacuum", especially when pressing the buttons
Pierce the bypass

One earphone plays a quieter / else / rustles membrane / have crackling
Blow through(andstill), clean, warm uporpierce the bypass
If all else fails and one of the headphones still playing quieter / louder, you can useDub Music Player, in it you can change the balance of the channels.
Globally - inViPER4Android(need a root). Also for players, you canEqualizer pieif you have Android 9 and higher (root is not needed).
It is also possible in Android 10, an option inSettings>Special abilities.

Both headphones have a very low
Typically, a software problem, it may happen very often, and the only solution - every time you doreset
it can also help: Turn adjustment "For Developers" (click to 8 timesSettings>About phone>Build numberorMIUI version) and activate the option thereDisable absolute volume level. This option has only 7 version of Android.Nuance for MIUI
Optionfor owners of Samsung, disable playback on the two devices at the same time.
If all else fails, keep in mind the possible physical causes described in the question above.

Hissing, whistling, hissing sound headphones while silence in music / movie (notafter installation pause)
There is no solution, perhaps, marriage.

- Dumpty headset button
- Something knocks on the earpiece
Fixfor the button or is itbattery (addition)

- One or both earbuds do not charge in a case
- Pull out the headphones from the case, and they do not connect themselves
- Headphones are not turned off when I put them in the case
- Headphones are connected as in a case
- Charging is frequently interrupted in a case
The presence or absence of charge controls headphone power. That is, when they are turned off charging when it pereryvanii (extracting) - are included.
Most importantly: do not forget to remove the film from the headphone contacts and charge the case. More can interfere with the ear cups, even standard, try without them.
Check notwhether contacts have sunkand their purity, especially on headphones. Also, a case can be junk. See question below.
In unstable charging should helpthisorthis. Or stick to the inside of the cover film bubble or foam.

Case does not charge itself and does not charge headphones
Probably,the posting was droppedor needreplace battery

The case does not work without connecting the charger
Defective battery

Right earpiece becomes shorter left
This is normal at all. After turning off the right on the left still remains 40-50% charge. Right time becomes shorter because of the greater loads.

Difficult to remove headphones from the case
This is temporary, later the plastic will be slightly wiped off and it will be noticeably easier to get out, even if you pry it from above.
In the meantime, to hook a finger over the lip of the recess to blow or shake of the hand, but be careful with the lid. or doSoorSo

Each time you turn on, you need to pair again
Should helpreset

On hiatus indefinitely headphones begin to reconnect with each other
describedhere, A temporary solution -resetStanding there. Probably the marriage.

When you turn off the screen smarftona interrupted or sound disappears
Decision

- Both headphones are left or right and do not interconnect
- Headphones have different names from the Chinese and global versions and are not interconnected
Surprisingly, it also happens that they mixed something up in production, examples:1, 2. There is no solution to this.

How to clean the mesh from sulfur?
Cm.here

Wet the earpiece
Since they are only protected from splashing, immersion in water is very likely to result in breakage.
It is best to disassemble them immediately (snap-on mounting), disconnect the battery and rinse the board in alcohol.
But even if everything works without or with flushing, this does not mean that problems will not appear in the future.
Stories of partial and full self-recovery:1, 2, 3, 4, 5, 6, 7

Lost / broken case / earphone. It can be purchased separately?
On AliExpress may be rare offer headphones, but sometimes there is no earphone, and garniutra from Xiaomi. Though,right heresell and briefcase, and left and right (Chinese version).
By the way, maybe someone on sites with ads selling their used / have the same separately.
They sayThat the headset is the global versionwill beto work with the Chinese. Case is universal. To connect you need to doreset
Do not write the questions and suggestions in the subject, for the publication of personal ads for the purchase, sale or exchange of the devices is permitted only in the sectionFlea market

I don't hear well during the conversation
This is for many. Possible reasons: poor-quality microphone, its location in the case, covering the hole with the tragus of the ear or due to noise reduction.
Hole enlargementdid not help
Recently, it was discovered that the sound is slightly better (less "bubnyavosti") if the only use for the left earpiece, ie when it is connected separately.
As a solution, you can remove the right earpiece and talking into his microphone. Turn it off (use the phone) can not.

How do I charge the headset without the briefcase?
Take any USB-charging by 5 Volt ( "amps" and the presence of QuickCharge have no meaning), cut the connector and simply leanthe necessary wiring to the contacts, "Plus" is closer to the speaker.
The charging time from 0% - 1:10 am also.are soldseparate chargers-cradles for one earphone.

Grmokost very high even at low
Try firstreset. Volume can be reduced in the equalizer player / flash / third party equalizer uniformly decreasing all frequencies.
Side:Equalizer fxorEqualizer pieIf you have an Android 9 and above. you can turn global regime In its settings (not available for Pie), ie the sound change even on YouTube.
For iPhone / iPad useHS Player, It does have an equalizer.

No sound when connected to PlayStation 3/4
The PS3: the settings to choose headphones for audio output:off instruction. And, if that connection Code: 0000
PS4: by default it does not support any BT-headset. May earn through USB Bluetooth-dongle.

The messengers (Telegram, Viber, WhatsApp, VKontakte) headphones do not work for recording voice messages / conversation
- For voice communications solutionhereQuality is low, there is nothing we can do.
- To hang up: it looks like it depends on the phone and the firmware itself is not correct

Voice recorders and other applications do not write a headphone microphone
Will only workthisDictaphone. A check mark in it makes the microphone available to other applications. Quality is low, there is nothing we can do.

- The sound suddenly became very bad
- When connected to a PC is very low sound quality
This happens when an application on your smartphone or computer begins to use the microphone.
In view of the outdated behavior in Bluetooth: when he was much slower to channel enough for sound transmission in both directions of its quality falls to 8 kHz (instead of 44).
This is not correct, the only solution is to close the "Voice" app, for example, Discord or leave voice chat.
On Windows Audio settings can also bedo this way

- The radio does not work, asks to connect a headset
- In service tests, the headset is not recognized
For all this we needwiredheadphones or headset.

When connecting to a computer, it asks for a driver, where can I download it?
Headphones are a standard A2DP device; there is no special driver for them.
To solve the problem, reinstall or install a more recent driver (stack) for your Bluetooth adapter.

Double-click voice assistant call does not work
Fixif you MIUI.
To work Google Assistant may be required to include in itStill>Settings>Voice input>Allow a Bluetooth commands to unlock the device
For Meizu is no solution, because it is not implemented in their firmware.

I have MIUI and the equalizer is not available for BT headphones.
Alas, this is a feature of the firmware, it only works with wired ones. The application should workEqualizer fxorEqualizer pieif you have android 9 and up.
Do not forget to include the global mode settings (not available for Pie), ie the sound change even on YouTube.

Dangling the case cover
Decision, stillandstill

Sometimes the sound disappears
Cm.here

Headphones do not work as a headset
Partial solution

Headphones do not connect automatically / no charge display
Just try off / on Bluetooth or restart your phone. Orreset the headphones.
Also, in the Bluetooth settings near the headphones, click the gear / arrow and turn on “Calls”.

No sound an incoming call on the phone and / or headphones
This is clearly a problem in the firmware of the phone.
In the Bluetooth settings, near the headphones, click the gear / arrow and turn off the "A2DP Profile" ("Music"). By itself, it will turn off music playback.

The button does not work to answer calls in the messengers (Telegram, Viber, WhatsApp, VKontakte)
She should not be, it can not be corrected.

There are problems with changing the volume level when used with another device.
Enable the "For Developers" settings (press 8 times onSettings>About phone>Build numberorMIUI version) and activate the option thereDisable absolute volume level. This option has only 7 version of Android.Nuance for MIUI

Earphone lost in the room
Important: without a connection, the headphones turn off after 5 minutes and then they can no longer be found on the signal.
If you listened to both and lost your left, then you won’t find it like that.
1. Disconnect from headphones through Settings
2. Install the applicationBluetooth Scanner, start, allow access to the location
3. Moving with the phone, watch the signal level fromRedmi AirDots_R / LorMi True Wireless EBs Basic_R / L: the smaller the number, the closer the earpiece
Alternatively, turn on the noisy track and set the volume to maximum. Note that this could theoretically damage the speakers.

When listening through headphones, the Wi-Fi speed on the device drops
Looks like it happens with any wireless headphones.
Again, Bluetooth works at 2.4 GHz, like most Wi-Fi points, which causes a conflict in the separation of frequency space.
The situation is aggravated by the fact that the headphones constantly transmit information and even doubly: first to the right earpiece, and he to the left one.
Total rate falls by 50-65%. Note that the proportion of the original, for example, from 80 to 40 or from 20 to 10.
Change channel Wi-Fi, of course, does not help. And on other devices too close speed can be reduced by 10-20 Mbps.
Here are the speed tests from a smartphone when music is playing. The presence of another headphone (not TWS) next to it reduces another 5-15 Mbps.
- Download / upload, Mbps
- 75/85 - without headphones
- 45/60 - one
- 20/40 - two
Working solution: use the router and other devices in the "only 5 GHz" mode (not supported by all, it also reduces the Wi-Fi coverage area).
Also popobrouyte translate router in "only N" mode.

- Case / earphones quickly discharged
- What is in them a battery?
- The earphone is warming up
Defective battery. Well, every battery eventually podverzhon loss of capacity.
Battery can be replaced: for casesuch(601235). Identical as in headphones (541112)not for salebut there is practicallyanalogue
By the way, in the cold, the batteries quickly lose their charge, so hide the headphones under the cap in the winter.
When heated, the earphone for your safety it is better to stop using it or even throw it away.

Case scratches hard
Buy a case, a lot of themon AliExpress
Please note that at least with ribbed edgesnot very high quality

- Where can I see what's inside the device?
- How to disassemble it?
Herephoto of everything inside (wait longer for download).
Special disassembly instructions None,herevideo andstillone. You just need to separate the body halves office knife, mediator or removing scalpel with latches.
In the case you need to pick out the inner half.