Your Apple ID is the username you use to log into your iPhone. Your iTunes & App Store purchases, saved credit cards, and much more are linked to your Apple ID.
If there’s something wrong with your Apple ID, or if you’re logged into the wrong one, you may lose access to apps or be unable to make purchases using Apple Pay.
These articles will show you how to fix problems with your Apple ID and help you make sure you’re logged into the correct one.
