Unfortunately the system is the last two days has become much slower i have no idea. The first video were of the last build as the device was still very much faster, The next problem is that the Setup Wizard does not work after a Full Wipe give it...
You can just replace the Keys, all Keys are Stickers
Uploaded with ImageShack.us
The device must not be opened !!!
Then copy these files to system/usr/keylayout/
No Sound Again, DSP Manager Crashes
GSM unstable(lost signal)
NFC cant switch on (Grey in Menu)
Actual Firmware https://onedrive.live.com/?authkey=%21APMSxpd%5FUoEEQBY&id=A120532B51026BDA%211816&cid=A120532B51026BDA
Unlock Bootloader https://rootwrp.com/unlock-teclast-t20-bootloader/
and flash with
fatboot flash boot +file
Left beside the lost pad on the Resistor
I think this is a SIM Conector.
It has fewer pins because no SD card is connected to it