First, try to forcibly restart the device to see if it has recovered:
Method for forcibly restarting the mobile phone:
① ① models of funtouch OS 3.2 and subsequent systems: press and hold the "power button"+"volume reduction button" 10 second at the same time;
② Press and hold the top round key 10 second or more to forcibly restart the mobile phone (NEX 3/NEX 3S is applicable);
③ System model before ③Funtouch OS 3.2: Press and hold the "power button" for more than 12 seconds.
Second, if it can be used again after surgery, you can try the following methods to avoid the recurrence of the fault:
1. If running a single application crashes, please try to upgrade the application to the latest version;
2. If the storage space of the device is low, the system performance will drop sharply, resulting in the application being stuck or stuck. It is recommended to use I housekeeper to clean the space regularly;
3. After upgrading the mobile phone system to the latest version or backing up the device data, restore the factory settings. The new version of the system improves the compatibility and stability, and optimizes the performance. Please go to Settings-System Upgrade (some models are Settings-My Device -iQOOUI Version) to check the system version information. If it is not the latest version, it is recommended to upgrade the experience.
Double cleaning operation method:
1), restore all settings and erase all data:
Go to Settings-System Management/More Settings-Backup and Reset/Restore Factory Settings-Restore all settings and erase all data.
2) Enter the recovery mode, choose to clear all data, and then restart the device.
Note: Please back up important data before operation.
You can enter Settings-System Management/More Settings-Backup and Reset/Restore Factory Settings-Restore All Settings-Restore, Restore Settings Options. ?
This operation will not delete files or software, but will cancel the password and restore all settings, including the set wallpaper, unlocking method, WiFi, default opening program, etc.
note:
Enter cloud service-device cloud backup-backup data type-system data-return-immediately back up some backup system settings and desktop layout;
Cloud service-data synchronization-turn on WLAN and Bluetooth to synchronize data to cloud service.
Go to Settings-System Management/More Settings-Backup and Reset/Restore Factory Settings-Clear all data.
Note: This operation will restore the mobile phone to its initial state and delete all data in the system space of the mobile phone, including account number, system and application data and settings, and installed applications. Please back up the important data of your mobile phone before operation.
How to enter recovery mode:
1. Folding screen: unfold the operation in the power-off state, press and hold the "power button" and "volume plus button" for about 5 seconds to enter the fast boot mode, press the volume button to select "Enter Recovery", and press the power button to confirm the entry.
2.2065438+Models launched after September 2007: Press and hold the "Power button" and "Volume Plus button" for about 5 seconds in the off state to enter the fast boot mode, press the volume button to select "Enter Recovery", and press the power button to confirm entry.
3.NEX 3/NEX 3S: Press and hold the top circle key for about 1.5 seconds in the closed state, then press and hold the volume plus key to enter the quick start mode, press the volume key to select "Enter Recovery", and press the power key to confirm entry.
4.2065438+Vehicles listed before September 2007: Press and hold the "Power button" and "Volume Plus button" for about 5 seconds at the same time to enter the recovery mode.
6. If the above methods are not solved, please back up the data on your mobile phone in advance and take it to the nearby vivo customer service center for processing.
Tips: It is recommended to bring relevant purchase vouchers (such as purchase invoices/warranty cards/ID cards) when you go, and call the service center staff in advance to ensure that the staff will go again during normal working hours, avoid running empty, and pay attention to safety on the way back and forth.