1, which can be forced to restart first, and the method of forced restart for each model:

① Press and hold the top round key 10 second or more to forcibly restart the mobile phone (NEX 3/NEX 3S is applicable);

② 2065438+models listed after September 2007 (X20 and later models) and new models listed later: press and hold the "power button"+"volume down button" 10 second at the same time;

(3) Vehicles launched before September, 2065438+2007 (vehicles before X20): press and hold the "power button" 12 seconds or more;

2. Repair the system (if there is no "system repair" mode, please guide the user to the service center for processing. )

Enter recovery mode-install system software-update the latest version through networking-OK-connect the available WiFi and charger. When the upgrade package is detected, click Download and Install to update and repair the system.

3. Enter the recovery mode-clear data-clear all data. This operation will erase all data of the mobile phone.

The method for each model to enter recovery mode is as follows:

1) After the folding screen mobile phone is turned off, you need to press and hold the "power button" and "volume up button" for 5 seconds at the same time in the unfolded state, then let go, and you will enter Fastboot, then press the volume down button to move to "enter recovery", and press the power button to confirm to enter recovery mode.

2)NEX 3/NEX 3S: Press and hold the top circle key for about 1.5 seconds in the shutdown state, then press and hold the volume increase key to enter the quick start mode, press the volume key to move to "Enter Recovery", and press the power key to confirm the entry into the recovery mode.

3) Models launched after September 2007 (after X20): Press and hold the "power button" and "volume up button" for about 5 seconds when the machine is turned off, then release the hand and enter the fast boot mode. Press the volume button to move to "enter recovery" and press the power button to confirm the entry into recovery mode.

4) 2065438+vehicles launched before September 2007 (before X20): Press and hold the "power button" and "volume up button" for about 5 seconds when the vehicle is turned off, and then let go to enter the recovery mode.

4. If the above methods can't be solved, please bring your mobile phone and purchase certificate to vivo customer service center for testing.

Address of customer service center: Go to official website /vivo Mall APP-My-Service outlets or the web version of vivo official website-Slide the bottom-Service Support-Service outlets query-select provinces and cities to query the address of customer service center. It is recommended to call in advance before going to avoid empty running, plan your trip reasonably and travel safely.