Itunes

to redeem iTunes gift cards follow these steps:

 1_Find the 16-digit code on the back of the card. ...

  2_ Open the App Store app.

  3_ At the top of the screen, tap the sign-in button. ...

  4_ Tap Redeem Gift Card or Code. ...

  5_ Tap Use Camera and follow the instructions on the screen. ...

  6_  Tap Redeem.