Generally, Apple policy prevents using a gift card to buy another gift card.
Some users have successfully exchanged or used these cards at physical Apple Store locations to facilitate a switch, though this is subject to current store policy. Important Safety Note Apple Gift Card buy itunes card with apple store gift card
Depending on which card you have, you can convert its value into usable credit for apps and music: Generally, Apple policy prevents using a gift card
You may call Apple at 1-800-MY-APPLE to request a balance transfer from the store card to an iTunes/App Store code. buy itunes card with apple store gift card
Generally, Apple policy prevents using a gift card to buy another gift card.
Some users have successfully exchanged or used these cards at physical Apple Store locations to facilitate a switch, though this is subject to current store policy. Important Safety Note Apple Gift Card
Depending on which card you have, you can convert its value into usable credit for apps and music:
You may call Apple at 1-800-MY-APPLE to request a balance transfer from the store card to an iTunes/App Store code.