adb shell su dd if=/dev/block/by-name/boot of=/sdcard/boot.img dd if=/dev/block/by-name/system of=/sdcard/system.img
: You must install the Allwinner USB drivers on your Windows PC so the tool can recognize your device in "FEL mode". 3. General Flashing Process Preparation allwinner a50 firmware link
(links available on Allwinner’s developer portal via a free registration). adb shell su dd if=/dev/block/by-name/boot of=/sdcard/boot
adb shell su dd if=/dev/block/by-name/boot of=/sdcard/boot.img dd if=/dev/block/by-name/system of=/sdcard/system.img
: You must install the Allwinner USB drivers on your Windows PC so the tool can recognize your device in "FEL mode". 3. General Flashing Process Preparation
(links available on Allwinner’s developer portal via a free registration).