Apple gift card
Can I use an apple gift Card to make a payment for iCloud
iPhone 11, iOS 16
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Yes. Redeem the gift card onto your account, and the balance will automatically be used to pay for any purchases or subscriptions through the iTunes platform including iCloud storage.
You still need a valid payment method on your account, however, it will not charge it if there is enough gift card balance on your Apple ID.
Click here ➜ How to redeem your Apple Gift Card or App Store & iTunes gift card - Apple Support
and here ➜ Check your Apple Account balance - Apple Support