Apple and Cingular have signed an agreement that will make the US' largest cell phone provider the exclusive carrier of Apple's forthcoming phone, sources report. Apple's iPhone remains on track for an early 2007 release.

As previously reported, Apple's phone will feature a candy-bar design with a 2.2-inch display and 3 megapixel camera. Robust iTunes and iSync support will also be delivered with the phone.

Apple's exclusive contract with Cingular is said to be good for the first six months, sources report, meaning other providers will be able to sell the phone in the second-half of 2007. Cingular had an exclusive on the Motorola ROKR—the first phone to feature iTunes—when it launched last year.

Think Secret - Apple iPhone to be Cingular-exclusive at launch