Q:What firmware whereby the need to install?
A:Depending on the type of firmware (full / custom) and what kind of recovery is installed on your phone.
- If the stock recovery, then you can install only the drain firmware. Set it is very simple, you must go to the stock file browser and tap on the file with the firmware. You'll see a prompt to install the update. Proceed according to the messages on the screen.
- If the custom rekaveri CWM or TWRP is possible to set any full firmware (not an upgrade), or custom. What firmware is worth - it does not matter (because when you install the full firmware phone system is formatted partition, erasing all data and then decompress in these same sections of the firmware content) - the main thing that was the right rekaveri.
All actions to roll back, and getting root serve a single goal - setting rekaveri. If TWRP or CWM rekaveri already installed - you already have everything you need to set the desired firmware.
For prompt rollback (with fixing all the installed programs and settings) on the state of the phone that you are more or less satisfied with, you must create a backup (backup system)
Q: Can I make a backup in CWM / TWRP recovery and then to restore it?
A:Yes, you can, but there are things that need to payspecial attention!
Firmware sometimes are composed of elements of the system areas that are in the backup will not be saved, when you install the new firmware of these areas are filled with content specific to the new firmware:
To properly restore the backup, you must first complete the flash firmware (ZIP) for that make a backup (if a backup was made for the firmware obtained by the OTA upgrade - install previous full firmware). Then, the content will be restored to the system areas of native backup. Without rebooting do the restore - restore the system at the time of backup.
If you do not - possible hard brick (especially if you jump from the Chinese international).
1. * # 06 # - tried it, shows IMEI
2. * # * # 001 # * # * - I tried it, it shows the status (0 or 1) of all service flags, including on line 16 - the flag is_root = 0 or is_root = 1, i.e. whether he was rutted at least once. I ruled the phone, then returned to the stock one, there is no root, but is_root = 1
3. * # 558 # - I tried it, 4 lines in Chinese: "Engineering mode", "Quality verification test", IMEI, "Restore factory settings", "Software information". Upon entering each of the menus, further information is also displayed in Chinese, transferred the item names to "Engineering mode", "Quality verification test" using a Google translator, there are tests of all iron components (screen, both cameras, touchscreen, speakers, vibromotor, etc. etc., etc.).
4. * # * # 4838 # * # * - I tried it, it displays four lines of the menu: "Phone information", "Battery information", "Usage statistics", "WLAN information". A bunch of different information, a lot of menus of wireless interfaces, cellular, WiFi, etc. Here bands, frequencies, etc. change. etc., in particular, the type of mobile network GSM, CDMA, 4G is set
5. * # 225 # - will show a picture with the ID of the components of the smartphone
6. * # * # 305 # * # * - changes the type of cellular network, works only for the old firmware version 1.16.3, on new versions it will cause the phone to freeze
7. * # * # 7777 # * # * - "Developer options", there is such a hidden menu on smartphones with a "normal" android too.
8. * # * # 4636 # * # * - service mode for OS up to version 1.0
9. * # * # 4838 # * # * - service mode for the OS after version 1.0
10. * # * # 112 # * # * - BBKlog
11. * # * # 118 # * # * - hide the switch to 3G mode
12. * # * # 5806 # * # * - show the switch to 3G mode
13. * # * # 10922768 # * # * - Audio test. I tried it, it's rather not an audio test, but an audio setup. Displays a menu of 11 lines, did not understand further.
14. * # * # 2768 # * # * - I tried it, it displays exactly the same menu as the command line above.
15. * # 08 # - select data storage location. I tried, zero reaction.
16. - * # 09 # - hot swap SIM card switch
17. - * # * # 8255 # * # * - Gtalk service monitor