iPhone 3G Suddenly No Service?

[Eatchipz]

My iPhone 3G has being working fine up until Yesterday when I was in the United States and it was working grand their with AT&T! Then all off a Sudden Yesterday afternoon it suddenly went to No Service. And When I arrived back in the UK today it didnt go back to O2 it still has No Service

 

[Eatchipz]

If you had no service in America or here then you might have a problem with your phone.

Do you have an Apple store nearby?

I was about to ask the same thing if it didn't work on US Network then it would be odd!.

I do indeed but my iPhone has had a trip in a swimming pool recently (long story) and so I think bringing it to the Apple Store might not be a good idea