So how exactly do you return your iPhone 4 if you want off the Apple train? Find out after the jump.
Returning your iPhone 4 for a full refund is actually quite easy. You can visit the online Order Status page  and sign in with your Apple account, or call 1-800-676-2775 to request a return. In order to get all your dough back, you'll need to have the iPhone returned to the Apple warehouse within 30 calendar days of when it was first shipped to you, not when you actually received it. If you bought your iPhone in an Apple store, just return to the same store with your receipt for your return. Make sure you include the box, charger, and all manuals in either case for your return. Bonus — you won't have to pay a restocking fee , even if you've opened the box!
As far as your wireless service, if you've properly returned your iPhone within 30 days of purchase or shipment, your AT&T contract will cancel automatically according to Apple's return policy . If it were me though, I'd go ahead and confirm that the service has been canceled with AT&T right away. You can never be too careful!