FAQ
FAQ
Can I remove preloaded music files?
No.How to remove annoying sound in background?
It is caused by poor quality TDA7850 amplifier. So far nobody found a solution.
https://forum.xda-developers.com/t/ac8257-cpu-based-units-problems-questions-couldnt-find-any-info-about-it.4171219/post-86074917
https://forum.xda-developers.com/t/ac8257-cpu-based-units-problems-questions-couldnt-find-any-info-about-it.4171219/post-84660277
https://forum.xda-developers.com/t/ac8257-cpu-based-units-problems-questions-couldnt-find-any-info-about-it.4171219/post-85120387
https://forum.xda-developers.com/t/ac8257-cpu-based-units-problems-questions-couldnt-find-any-info-about-it.4171219/post-85245713How to root the unit?
https://forum.xda-developers.com/t/ac8257-cpu-based-units-problems-questions-couldnt-find-any-info-about-it.4171219/post-84757223
https://4pda.to/forum/index.php?showtopic=1000527&st=180#entry99534170How to install TWRP recovery?
See Brick Recovery pageHow to extract APK file from the firmware?
https://forum.xda-developers.com/t/tool-windows-gui-classykitchen-for-android-roms-development.3862584/post-78056892Can I install Launcher from a different vendor - Isudar?
Yes, there is a chance it will work as posted here
https://forum.xda-developers.com/t/ac8257-cpu-based-units-problems-questions-couldnt-find-any-info-about-it.4171219/post-84575187
https://forum.xda-developers.com/t/ac8257-cpu-based-units-problems-questions-couldnt-find-any-info-about-it.4171219/post-84919383How to activate ZLink app?
You can't activate it. Only the manufacture can activate it. The seller can't help you with it.How to solve the problem with a wrong IMEI?
See Brick Recovery pageHow to improve microphone quality?
You have to install a new microphone
https://forum.xda-developers.com/t/ac8257-cpu-based-units-problems-questions-couldnt-find-any-info-about-it.4171219/post-84737409
or try to adjust settings
https://forum.xda-developers.com/t/ac8257-cpu-based-units-problems-questions-couldnt-find-any-info-about-it.4171219/post-84709073
https://forum.xda-developers.com/t/ac8257-cpu-based-units-problems-questions-couldnt-find-any-info-about-it.4171219/post-85235221How to customize system settings on start?
You need to change the system config in the firmware prior to installing the update
https://forum.xda-developers.com/t/ac8257-cpu-based-units-problems-questions-couldnt-find-any-info-about-it.4171219/post-84920973Launcher displays 0 speed all the time
Go to Android Settings > Apps > See all > Find "Launcher" > Permissions > Enable Location permission