Force Restart an iPhone
If your device is frozen or unresponsive, try force restarting it. To do this, press and quickly release the volume up button, then press and quickly release the volume down button. Finally, press and hold the side button until you see the Apple logo. This should force a restart of your iPhone SE (1st generation) and hopefully resolve the issue.
Force restart models with Face ID.
- Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the side button.
- When the Apple logo appears, release the button.