iPhone won't connect to the internet without wi-fi

[Anonymous]

Hi, I was wondering if anyone could help me.

I upgraded my sim only contract at the end of september and since then my iPhone won't connect to the internet unless it's wi-fi. 

It comes up with a message saying I am not subscribed to a cellular data service, how do I stop this from happening?

Thanks

[jonsie]

Check the APNs. idata.o2.co.uk for iphone data bolt on or mobile.o2.co.uk for a non-iphone data bolt on.

[Anonymous]

Tried switching APNs, no change, thanks though.