(1) In the power-off state, press and hold the volume plus key and the power-off key, and then release them when the boot screen appears to enter recovery.
② enter Recovery & gt Chinese > clear data > clear all data.
2. Recovery mode refers to a mode that can modify the internal data or system of Android. In this mode, you can brush in a new Android system, back up or upgrade the existing system, or restore the factory settings here.
Generally speaking, updating the system will cost more electricity, and the mobile phone will eat up the memory and run faster because the new system has more files than the old system.
In order to have these increasingly complex functions, mobile devices now need more complex firmware. It is these firmware that control the work of the mobile phone. However, the complex technology has brought great challenges to mobile phone manufacturers and mobile communication operators: how to ensure the good quality of mobile phone firmware and the reliability of 100%. Every year, the sales of mobile phones are huge, and it is estimated that there are more than 600 million mobile phones in 2004, and the application conditions of these mobile phones are varied, so the more complicated the technology, the more likely it is to cause operational errors due to failures.