How to redeem Amazon gift card
1. Open the Amazon app, and tap the person icon to access your account information.
2. Click on the Your Account button.
3. Scroll down to the Payments section, and select Manage gift card balance.
4. You’ll be brought to the page where you can redeem a gift card or add a balance to an existing one. Tap Redeem another gift card to activate your gift card by entering the code from your email.