While redeemed iTunes credit can be used for hardware online, many physical Apple Retail Stores may not be able to pull from your digital Apple Account balance directly; they typically require a physical or digital Apple Gift Card with a scannable QR code.
Official Apple Support policies state that gift cards cannot be used to purchase other gift cards. buy apple store gift card with itunes
If you have an old iTunes or App Store & iTunes Gift Card, you do not need to "buy" a different card to use it at the Apple Store. Instead, you can follow these steps: While redeemed iTunes credit can be used for
Once redeemed, the funds are added to your Apple Account Balance . Instead, you can follow these steps: Once redeemed,
In 2020, Apple began merging these into the universal . This "all-in-one" card allows users to redeem credit once and spend it across all Apple platforms—both digital and physical. How to Use iTunes Credit for Hardware