If you can not unlock the screen, press and hold the power button for about 20 seconds and the phone will turn off. 7- After finishing again with the volume keys, click on “reboot system now” and press the power key of your Brandcode B7S, the device will reboot and take several minutes to start while restoring the device to its factory state and optimizing the applications pre-installed in the system Android 5.1.
Factory reset and erase all data
If you can not unlock the screen, press and hold the power button for about 20 seconds and the phone will turn off. 7- After finishing again with the volume keys, click on “reboot system now” and press the power key of your Brandcode B73, the device will reboot and take several minutes to start while restoring the device to its factory state and optimizing the applications pre-installed in the system Android 4.2.2.
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