The step is to restore your iOS device using iTunes. In this situation, you'll need to keep the backup iOS file safe in order to restore and utilize it. Try to restore from the most current and error-free backup iOS as much as possible. To get started, you'll need a computer (Windows or Mac) with the most recent version of iTunes installed. When you're ready to get started, follow these steps:

1. Use the USB cord that came with your iPhone 7 to connect it to your computer.
2. On your PC, launch iTunes.
3. Wait until your iPhone 7 is detected by your computer or iTunes. On your iPhone, tap the option to Trust This Computer if offered.
4. Perform a force restart while your iPhone is connected by following these steps:
5. Simultaneously press and hold the Sleep/Wake (Power) and Volume Down buttons. Hold both buttons down until you get the Recovery Mode screen.
6. To restore your device from an iTunes backup, pick Restore when you get the choice to Restore or Update.
7. Wait for the restoration to finish after selecting the iOS backup you wish to use. To figure out which iOS backup file to utilize, look at the file's date and size.
8. Continue with the device setup once your iPhone has been restored.