Unable to open dial-up SMS contact.

Just try it.

Before Sanqing, it is best to open the backup software that comes with your mobile phone to make a backup, which is convenient for recovery.

(Before the third cleaning, be sure to back up the important files in the SD card to the computer, which will erase the data in the SD card. )

Sanqing is to format the mobile phone, which can solve most system problems, software flash back and other anomalies. Sanqing was also used to update the system before.

Clear the system data to ensure the normal operation of the brush machine.

Method of entering Sanqing rec mode

The first method, the mobile phone opens the system update software, selects the menu key, and enters the rec mode.

The second method is to press and hold the power button and the volume plus button at the same time in the shutdown state (button the battery yourself, and press and hold the power button for ten seconds to force the shutdown), then light up the screen and release it later.

Then go to a page,

simplified Chinese

English

3. The power key is the OK key, and select the volume up and down keys. There are three options in this page. Press the power button to confirm and select Simplified Chinese.

4. Select Clear Data.

5. Select Clear Cache, and then select Clear Data again after clearing.

6. Select Clear User Data, and then select Clear Data again after clearing.

7. Select to clear all data. After clearing, choose to restart the phone.

8. Select the nearest access system.

9. After the phone is turned on, find, back up, open and recover all data.

Visit miui Forum for more information.