Procedure:
1. Open/Run MRT
2. Choose: Format(Unlock), BBK(VIVO) only, Y83_Only
4. Then hit Start Button
5. Insert usb, install drivers if needed
5. wait until done
1. Open/Run MRT
2. Choose: Format(Unlock), BBK(VIVO) only, Y83_Only
4. Then hit Start Button
5. Insert usb, install drivers if needed
5. wait until done