What I want to warn in advance.This is not a manual or guide. And this is not a way to lift bricks
. What you need to the first
turn? Light head, arms straight and awareness of all ongoing procedures.
Because Xiaomei made it impossible to downgrade to version 8.7.5 above, will open a small "loophole." In order to be able to both upgrade and downgrade.Stage One - upgrade
If you have firmware 8.7.5 and below, but there is a desire to try new firmware and painless back.
1: Download the correct firmware zip file
2: Do not archive unpacking (in order to avoid errors when zapakovke back) delete the folderfirmware-update
(For in it lies the main "evil" - the whole chain of downloaders). Can be done both on the PC and on the devayse (I do through total commander).
You can remove or comment out the line in the script to install the contents of the folder firmware-update (for the paranoid, because in the absence of "idle" running script files themselves)
3: In TWRP doing necessary wipe. Install firmware Ruth. Reboot into TWRP, reboot the system
4: poyuzat firmware if you do not like, rolling back. Or a backup, or install cleanStep two - downgrade
If you have firmware version 8.7.5 and higher than she is not satisfied and there is a desire to revert to an earlier version.
Repeat step 1-3Important. If you do not remove the firmware-update folder:
When upgrading will become a hostage of the new loader
When you get a downgrade brick
Similarly, one can switch toany
firmware (official, localization, custom bikes) Modem change
The modem itself (NON-HLOS.bin) does not affect the upgrade nor downgrade. Changes only version and the quality of communication / Internet (for better or worse). To change the modem is enough to extract a file NON-HLOS.bin of firmware-update folder and replace in the archive with the modem (you have a cap). Or sit and wait until someone does not do it for you. Delov for a moment longer to download.
All writing is applicable tounlocked bootloader
. As will be locked, I do not know.
You can poudalyat entire chain downloaders from the archive under fastbut and sew through the PC. If there is an understanding, you can do. If not, do not touch. For ... easily you can get a brick.