Q: How do I change my apple ID on my iPhone

Hello Idkkkkk,

If you are trying to change the Apple ID signed into the iTunes and App Store, you can use these steps:

Changing your Apple ID account

Tap Settings > iTunes & App Stores, then tap the Apple ID signed in.

Sign out of the current Apple ID account and then sign in with another account or create a new Apple ID.

You can find the full article here:

iOS: Changing the signed-in iTunes Store Apple ID account

http://support.apple.com/kb/ht1311

Thank you for using Apple Support Communities.

Best,

Sheila M.