I've had my XE for a few weeks now and all of a sudden the data link has stopped working. Calls & texts are still fine and when in range of a Wifi hotpsot it all works but on a 3G signal (which registers as strong) I get no connection. Any ideas what might be wrong? Is this likely to be a hardware fault or might it be Orange mucking me about?

First stop is to try a reboot. Used to have this occasionally on my HTC desire.

Have you checked that you haven't accidentally toggled data off?