I recently bought an iPhone 4 which was locked on 3. I rang 3 and requested to unlock it. I received a message on Tuesday that if I connect it to iTunes it will be unlocked. Since then I've synced it, restored it and did everything but it's not unlocked. I rang apple as well and they told me it's been unlocked. I don't understand why it's not taking any other sim. It' just says no sim. When I put 3 sim in there it works fine. Is there something I am not doing right???? pls help thanks.