Why can't the iPhone7 Plus rear camera focus?

This is caused by an error in the camera program of the mobile phone or a hardware problem.

First upgrade the mobile phone system to the latest, turn it off and then restart it to see if the rear camera of the mobile phone can work normally. The specific methods for upgrading the mobile phone system are as follows:

1. First click "Settings" on the phone desktop.

2. Then select the "General" option in the setting interface.

3. Then open "Software Update" to enter.

4. After entering, find the latest version of IOS and click Enter.

5. Finally, turn on Automatic Update.

Second, restore the mobile phone to the factory settings and check whether the rear camera of the mobile phone can be used normally. ?

Third, restoring the factory settings still can't solve the problem. You can take your mobile phone and warranty card to the official repair center of Apple mobile phone for inspection and maintenance.