A50 Firmware - Allwinner

Windows users must install the Allwinner USB Driver (usually included in the PhoenixSuit installation folder). Without this, the PC will not detect the A50 in flashing mode.

If your tablet is still functional, you can dump the firmware using adb and dd commands. This requires root access. Backup the following partitions: boot0 , boot1 , uboot , boot , system , recovery . allwinner a50 firmware