How to solve the problem of unavailable iPhone

1. Restart the device

You only need to press and hold the power button and then drag the "Slide to power off" button to turn off the device. . Wait a few seconds and then press and hold the power button to restart the device.

2. Update the iOS system

You can go to the device's "Settings" > "General" > "Software Update" to check if there are available updates , if available, download and install them.

3. Restore the device

You can consider using iTunes to restore the device. Connect your iPhone to your computer, open iTunes, and follow the prompts. After selecting the restore device option, iTunes will clear all data and reinstall the latest iOS system.