1. Do not remember the power-on password shutdown or can be, we first hand machine after the boot, the boot method is: At the same time press the "volume up and down key + Power-on key" as shown in the following figure.
2. Into the above image interface, we then through the "volume key move Up and down" select "Chinese Simplified" and then click "Confirm" to enter, as shown in the following figure.
3. Then we press the "volume key up and down" to find "clear data" and then press the Power-on key to "confirm" as shown in the following figure.
4. Choose to purge user data or clear all data, but it takes longer to select to clear all data.
5. The cleanup process will have a progress bar as shown in the following illustration.
6. Clear the successful screen.
Friendly tips, this is actually the recovery of the phone factory set up, after the recovery of the phone's contact, SMS will be removed, but stored in the SD card data is not to clear off Oh, we can rest assured Oh.