The iPhone 4S was finally unveiled to the world last night and pre-orders for the device will begin in two days time, on Friday 7 October.

iPhone 4S pre-orders open in UK

The device will go on sale in many countries including the UK a week later on 14 October and several UK mobile providers are already offering customers the chance to sign up for more information about the new handset.

Vodafone will be stocking the iPhone 4S from launch day, as will Three, according to Electric Pig. You can register for further information on the Vodafone site while Three invites you to stay tuned for more details.

O2 is currently inviting customers to sign up for more information about the iPhone 4S when it is ready, but hasn't revealed when it will be stocking the device or what contracts it will be available on.

However, the news for customers of either of Everything Everywhere's two mobile carriers doesn't look as encouraging - Orange's site doesn't yet make any mention of it and we can't find any information about it on T-Mobile's site either.

If you want to buy direct from Apple, you'll pay at least £499 for an iPhone 4S, which is presumably a SIM-free model. Older iPhones have had their prices reduced - the iPhone 4 is £429 SIM-free and the iPhone 3GS, which it seems will still be available for now at least, is £319 SIM free.

You'll also need to move quickly - we're told doors to the Apple Stores will open at 8am on the morning of 14 October and we know for sure that there's already one person in the queue outside London's Covent Garden store.

UPDATE: You can now also register your interest with T-Mobile and Orange.