Software upgrades have the potential to overwrite your current settings, leaving you with just two options: good or terrible. Apparently, the conclusion isn't favorable in this situation, and you'll need to take action to correct it. Resetting all settings on your iPhone 7 is a suggested approach. This will return the system settings to their default settings, allowing you to manually customize the choices and features you want to utilize. Here's how you do it:

1. Go to the Settings tab.
2. Select General.
3. Reset may be found by scrolling down and tapping it.
4. Choose Reset All Settings from the drop-down menu. This restores system settings without altering any data saved on your phone's internal memory, so no data is lost.
5. To continue, enter your device passcode if requested.
6. To confirm the system settings reset, tap.