Using Profilematic to switch to 2G at IDLE turned out to be a poor solution for me unfortunately :/ Once it had been set to 2G after being idle for 10min I found it could no longer receive calls...* It wouldn't even ring, there'd just be a long pause & then the message bank service would kick-in. I've no idea what that's all about, I assume my telco doesn't support 2G/GSM, it may be better with other towers, I've only tested it on the tower used at home. Plus when it came out of idle it took quite some time for it to switch back to 3G, so I couldn't fast-dial a no. right away, & general usage was a bit sluggish. I'm yet to try some other things linked-to in this post, if they don't work then I guess I'm screwed. *the reception bars would usually (not always IIRC) have a red strike through them, & to the right it would say "Emergency calls only".