What are the steps to Fix An iPhone Error Code 53?

SOURCE: How to Fix Apple iPhone Error 53?

What you should do

1. If iTunes is open on your Mac or PC, quit iTunes.
2. If your iOS device is plugged into your computer, unplug it.
3. Make sure that your device has the latest version of iTunes.
4. Connect your iOS device to your computer with a USB cable.
5. Open iTunes and select your device.
6. When you see the option in iTunes to Restore or Update, click Update. iTunes will try to reinstall iOS and restore your device without erasing your data.1
7. If you can't get past the Apple logo screen, force restart2 your iOS device. When you see the option to Restore or Update, click Restore.
8. When you see your iOS device's Hello screen, follow the onscreen steps to set up your device.
   • If you previously backed up your device, you can set up from your backup.
   • When you see the screen for Touch ID, tap Set up Touch ID later.
9. If Touch ID on your device didn't work before you saw error 53, the feature still won't work after you update or restore your device. Contact Apple Support to ask about service options for Touch ID.