3.0.1 3gs with ultrasnow, now getting 'sim card not supported' in itunes
I have a 3gs with 3.0.1 running ultrasn0w so I can use vodafone in the uk. All is working on the phone side, with no issues at all, however this weekend the phone has lost the ability to sync...
In itunes when I plug in the phone, it says a new firmware is available (3.1) so I click cancel to stop it downloading or installing, and instead of then showing the status page for the phone and syncing it shows 'the sim card inserted in this iphone does not appear to be supported'
The phone itself is still activated though and I can make calls etc.
Any idea what is going on here - have apple now put a stop to using a different carrier with itunes than the official, or has something just gone odd on my setup/phone?