Download and install QQ on vivo smart phone in app store, suggesting that the old version of the signature does not match the new version, which may be abnormal installation package or abnormal data stored in the software.

You can try the following methods to solve it:

1. After backing up the data in QQ, uninstall QQ and re-enter the app store to download and install QQ.

Second, change the download channel to install QQ.

Specific operation steps (taking downloading QQ by mobile phone browser as an example):

1, enter the browser and click Baidu.

2. Search QQ, and click Ordinary Download.

3. Click Download and Install.

3. Clear the cached data in the App Store: Go to Settings-More Settings-Apply-All -App Store- (Save)-Clear the data.

Specific operation steps (taking vivo X9 as an example):

1, enter the settings.

2, more settings

3. Applications

4. All

Step 5 find the app store

Step 6 enter the warehouse

7. Select Clear Data

4. Enter Settings-More Settings-Restore Factory Settings-Clear all data (and check the format USB flash drive/mobile phone storage).

Specific operation steps (taking vivo X9 as an example):

1, enter the settings.

2, more settings

3. Restore factory settings

4. Clear all data.

5. Check the formatted USB flash drive or mobile phone storage, and click to restart the mobile phone.

Note: Clearing all data will delete all data in the mobile phone, including SMS, contacts, notes, photos, etc. Please back up important data before operation.