Your iPhone and iPad have a Magnifier that you can make available in Control Center to help you actually see those tiny serial numbers.


 How to Use the Magnifying Glass on Your iPhone or iPad:

  1. Open the Settings app on your device and go to General.
  2. Go to Accessibility and than open the Magnifier settings.
  3. Turn the Magnifier setting on. 

How to Add Magnifying Glass to Your Control Center:

  1. Open the Settings app on your device and go to Control Center.
  2. Select Customize Controls.
  3. Find Magnifier among the available options and tap on the + button.
  4. Place the Magnifier wherever you desire in the control center.