Its running the latest firmware and the voltage look like its O.K. from using BatteryGraph.
I'll give Vodafone a call in the morning and get them to send a new SIM out.

It's not every time I use the browser it reboots, its not done it at all today, but I've been on WiFi not 3G.

I'm liking the sound of it being a SIM issue.

I had a same problem with the battery running down if I was using several IM's all day. No I only enable it when I want to use it and its lasts miles longer..

When I flashed it, yep I did the eMMC as well and never rebooted between adding eMMC and firmware.

Thanks nice to know everyones elses is O.K.