restore my iphone

What exactly are you trying to do? Restore a backup? Do a factory reset? More information would help.

If you are trying to do a factory reset, do a backup and try a factory reset. Then restore from your backup.

Restore to Factory setting.      

Backup - Restore your device from an iCloud or iTunes backup.      

See:

Restore your iPhone, iPad, or iPod touch from a backup https://support.apple.com/en-us/HT204184

Restoring an iPhone, iPad, or iPod touch backup from iCloud or from a computer when a later version of iOS is required https://support.apple.com/en-us/HT203434

How to Restore Backup of Old iPhone to a New iPhone https://smallbusiness.chron.com/restore-backup-new-iphone-53329.html