FAQ

How to search in forum threads.

For some reason, most forum's advanced search function is difficult to use to just search within a specific thread. Here is how to do that

Just type in the search string in the main search box (usually top of the page), then find the drop down menu to select "This Thread" instead of "Everywhere" or by specific member name.

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://xdaforums.com/t/ac8259-cpu-based-hu-problems-questions-mainly-yt5760.4171219/post-86074917
https://xdaforums.com/t/ac8259-cpu-based-hu-problems-questions-mainly-yt5760.4171219/post-84660277
https://xdaforums.com/t/ac8259-cpu-based-hu-problems-questions-mainly-yt5760.4171219/post-85120387
https://xdaforums.com/t/ac8259-cpu-based-hu-problems-questions-mainly-yt5760.4171219/post-85245713
How to root the unit?
See Brick Recovery and PC flashing page.
How to install TWRP recovery?
See Brick Recovery and PC flashing page.
How to extract APK file from the firmware?
https://xdaforums.com/t/tool-windows-gui-classykitchen-for-android-roms-development.3862584/
Or use 7zip.
How to activate ZLINK app?
You can't activate it. Only the manufacture can activate it. The seller can't help you with it. See also here.
How to solve the problem with a wrong IMEI?
See Brick Recovery and PC flashing page.
How to improve microphone quality?
You have to install a new microphone (see here) or try to adjust settings:
https://xdaforums.com/t/ac8259-cpu-based-hu-problems-questions-mainly-yt5760.4171219/post-84709073
https://xdaforums.com/t/ac8259-cpu-based-hu-problems-questions-mainly-yt5760.4171219/post-85235221
How to customize system settings on start?
You need to change the system config in the firmware prior to installing the update. See also here:
https://xdaforums.com/t/ac8259-cpu-based-hu-problems-questions-mainly-yt5760.4171219/post-84920973
Launcher displays 0 speed all the time!
Go to Android "Settings" -> "Apps" -> "See all" -> Find "Launcher" -> "Permissions" -> Enable "Location" permission
Will firmware ever move beyond "real" Android 9?
Unlikely.