If your iPhone 6 is not working properly, you may need to restore it from a backup. This will erase all of the data on your phone, but it will restore all of your apps, contacts, messages, and other data.
To restore your iPhone 6 from a backup, you will need to connect it to a computer and open iTunes. Once your phone is connected, select it in the iTunes window and click the “Summary” tab. Under “Backups”, click “Restore …
