How to load an Apple gift card to a phone
I have a Apple gift card that has 30 digits on the front and I want to know how do I load that to the iPhone
The code should only have 16-digits and is on the back off the Apple Gift Card. For some gift cards, you might need to peel or gently scratch off the label to see the code.
You can use the camera, as explained in this related article:
How to redeem your Apple Gift Card, App Store Card, or App Store & iTunes Gift Card - Apple Support