User Manual
Page 74
... be solved, the last resort is available 1. Choose whether to allow the use of an available update, connect your phone to do a factory reset. In case your computer using the supplied USB cable to be available. If pressing and holding the POWER button doesn't work, then remove the battery, wait for...
... be solved, the last resort is available 1. Choose whether to allow the use of an available update, connect your phone to do a factory reset. In case your computer using the supplied USB cable to be available. If pressing and holding the POWER button doesn't work, then remove the battery, wait for...