BOOTMODE WITHOUT JUMPER
1. Make Sure Unit is Powered off.
2. Hold The Volume Key (UP) + POWER BUTTON
3. Wait for the CALL BUTTON to Blink
4. After the call button Plug in the usb.
SETOOL UNLOCK
1. Open
SeTool
2. Go To "SEMC A2"
3. Select Mode "KF757"
4. Check "Signmode Only"
5. Click "Unlock / Repair"