I was a first generation iPhone owner, albeit with an unlocked iPhone but still on O2. When I went to get the iPhone 3G on Friday I had my PAYG number transferred to my contract SIM. I ran home, activated my phone in iTunes but due to O2's masses of problems my SIM Card didn't work. So, I went back to the store and they said until my new SIM Card is activated just use my old PAYG SIM. Which I have been doing. Now, neither works. Both are displaying "No Service". I have checked to see if something is wrong with the phone (which is actually being replaced today due to a faulty headphone/microphone jack), but there isn't (I tried out another O2 SIM and that worked). So I am at a bit of a loss at the moment, I don't actually have a phone to use more of an iBrick. I was wondering if anyone else is having this situation?