I just ran an IPhone 3gs Update?

Just updated my phone through iTunes, finished the update and phone restarted stating sim not valid, no service on the phone and I can't use it. It was working fine last night before the update ( on o2).

I'm not trying to 'rub it in'…

i've had the 3GS for over 2 years and haven't updated anything… My attitude is, if it ain't broke then don't fix it… Why do people need to have the latest and greatest, I just can't grasp this new kind of 'addiction' with new technology and software updates…

As I mentioned my 3GS is as it was when I first purchased it… And it still works 'perfectly'!