To restore your device to its factory state, use a firmware downloader like SamFW or Frija.

Hold the button on the board, apply power, and then connect the USB cable to your PC. Follow the on-screen prompts to format and write the image. BESTTAB A20 If you have the BESTTAB A20

: Use the Odin Flash Tool on a PC. Put the phone in Download Mode (Hold Volume Up + Volume Down and connect to PC).

: Download the latest stable Android images directly from the Olimex Wiki .

is Treble-compatible, you can download GSIs from the Project Treble GitHub .

: Identify your region code (e.g., XAA for US Unlocked, INS for India).

: Check Settings > About Phone for your specific model (e.g.,

device are you using so I can provide the exact download links? A20-OLinuXino-MICRO - Olimex