Problem after OS 3 update

[FN-GM]

Hi,

I dont fancy waiting 15 mins waiting to get some support so i thought i would ask here. I have an iPhone 3G and i upgraded to OS 3 on Wednesday. Since then my 3G doesn't work. I am on pay as you go not contract.

I get the following

Could not activate cellular data network: You are not subscribed to a cellular data service

It worked perfect before the upgrade.

Any suggestions please?

[tmcd35]

I've not tried 3G on my iPhone since update, but a did read in another thread on here that someone else had to re-enter the correct username/password settings for 3G access. You'll have to check O2's website for the correct settins.