I am on 3 Network in the UK ( Not 3g ) just 3 network www.three.co.uk and my Mum is getting a Upgrade on Vodafone and im gonna have her Upgrade so if she has a iPhone 4G and i get it unlocked to any network will my 3 Sim work with the iPhone 4G because i heard a rumor that iPhones are not Compatible with 3 Network i don't no if that is right please answer me i dont want to order a iphone and realise it wont work? thanks