I’m sorry to say, but get rid of that device!
I have a C2D6 revision device with the same problems. There are no fixes for it, trust me. Installing random drivers and tweaking Windows registry s is not a permanent solution, since we are dealing with the bad hardware!!! This is not a cheap device.
I was OK with the WiFi not working properly, since I could store my files on a micro SD card(s). But, today I was reading a PDF and micro SD (Samsung EVO+ 64GB) vanished from Android OS. The system tries to mount it continuously. I thought that it was a problem with the card, but the card works normally on my PC. I tried some other cards, non of them work. Both Android and Windows are affected. System sees that a card is inserted, but it cannot “start talking” to it.
Some other problems with this device:
- short battery life, <5h. It drains @10% per hour even in standby.
- random lockups with black screen prompting me to reset the device.
Piece of shit Teclast device. I’m so pissed off at Teclast.