: With the phone powered off, the technician held the volume buttons—a secret handshake to the device's bootloader. The Handshake
: A green circle/ring will appear once the flash is successful. Disconnect and reboot. Beyond Official Updates: Custom ROMs How do I want to upgrade my Oppo F1 s? firmware oppo f1s a1601
After successfully flashing the firmware on your Oppo A1601, the first boot will take a long time (5–10 minutes). This is normal as the phone is rebuilding the cache and the Dalvik runtime. : With the phone powered off, the technician