Q: How do i Change my apple ID on my phone?

Hello Sun and Moon,

Thanks for using Apple Support Communities.

For more information on this, take a look at:

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

http://support.apple.com/kb/HT1311

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.

Best of luck,

Mario