Hello, I am sorry if this question has been answered already, I could not find a proper answer elsewhere! I have a o2 uk pay and go iphone. It came with its own simcard, with an 1 year unlimited web bolt-on. I travel a lot abroad and I need to unlock it for obvious reasons. Unfortunately I have accidentally updated through itunes to 3.1.2 and can't unlock it at the moment. I was thinking to return it (I am in the 14 days period), to get a 3gs, and unlock it before updating. But before I do this bold move, I need to know something: If I unlock my iphone, in the UK I can still use the ORIGINAL o2 pay and go simcard that is provided with the iphone? Will it work 100% and will I still be able to use the unlimited web bolt on? Many thanks!