[groovyvectra]

I also have this problem... I got my Diamond from Telstra in Australia, who were NO help and said there was nothing wrong with the phone... however some searching on line seems to show up that if you have the DIamond set up to sync data with W Exchange, then there is this problem of the phone constantly rebooting during a phone conversation. If anyone has a fix I'd be very grateful. I love my Diamond but this is a pain in the butt and not what you'd expect from an expensive bit of kit.