We are both with 3 already. If I stayed with 3 my idea was to get a new phone and swap the sim form my wifes sony (which she hates with a passion) into my wildfire, or even the new phone. If I get a new phone as opposed to just going for a cheaper contract the bluetooth has to work. It stopped working when my wildfire was updated from Android 2.2 to 2.3 which was very annoying!

I'd recommend GiffGaff. It's a bit different in that there's no call centre's as such so topping up is done mostly online, or you can do it using 02 vouchers. but If you don't mind having no call centre support its a great cheap alternative. you can get goodybags with your credit, for a fiver you get 60 mins and unlimited texts, for £10 you get 250 mins, unlimited texts and unlimited mobile data.

I've saved a fortune since I moved across from 02. they use 02's network and because they give you payback if you refer people or if you post on the forums I'm now about £30 in credit with them. so it's effectively working out as free.

I wouldn't have a personal mobile on O2's network if they paid be £30 a month.