Wonder if anyone can help. Got my my new Curve yesterday and all has been well. Have been using mobile internet, Twitterberry and sending and receiving emails. However, all of a sudden these have stopped working. No internet, no emails and a "network request failed" error message.

I don't want to go messing around with the settings, in case I do more damage than good and I'm sure I haven't changed anything in any case.

Could this just be the network being down (02) (does this happen often?!) or has something gone wrong?