How to Redeem the gift card:

Redeem a gift card with your iPhone, iPad, or iPod touch:

• Open the App Store app.
• At the top of the screen, tap the sign-in button  or your photo.
• Tap Redeem Gift Card or Code. If you don’t see Redeem Gift Card or Code, sign in with your Apple ID.
• Tap Use Camera and follow the instructions on the screen. If you have trouble redeeming the card, tap Enter Code Manually, then follow the instructions on
• the screen.
• Tap Done.

Redeem a gift card on your Mac:

• Open the App Store.
• Click your name or the sign-in button in the sidebar. 
• Click Redeem Gift Card.

Redeem a gift card on a Windows PC:

• Open iTunes.
• From the menu bar at the top of the iTunes window, choose Account.
• Choose Redeem.
• Sign in and follow the instructions on the screen.

Redeem a gift card on your Android device:

• Open the Apple Music app.
• Tap the menu button , then tap Account.
• Tap Redeem Gift Card or Code.
• Enter the 16-digit code. Then tap Redeem.