Apple has started selling factory-unlocked, contract-free models of its iPhone 4S from its online Store in USA, Redmond Pie has learned.

If you’re one of the many that have spent all morning sat hitting the refresh key in a pre-ordering frenzy, chances are you spied one seemingly glaring omission from Apple’s online ordering system: there were no unlocked iPhone 4S handsets, at least in the U.S.