How do I add money to my account with an apple gift card without using a debit or credit card
I do not want to put my credit or debit card due to scammers.
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Here are the steps to redeem a Gift Card to add money to your Apple Account.
How to redeem your Apple Gift Card or App Store & iTunes gift card - Apple Support
There is no guarantee that will allow you to download apps as you may still get a message saying payment information is required. It may be necessary to verify your identity and region to make sure you are using the correct App Store. Some users have attempted to change the region on their device to be able to use an App Store from a different region to download apps or use services that would otherwise not be available to them. The payment method would need to match the region that is set for your device.