What phone have you got at the moment? I'm not a massive phone geek, phones generally bore me, if I want a photo I'll use a camera not a phone with one, and if I want to listen to music I have my iPod, I was also worried about having a fragile phone which I wouldn't be able to cruise through the menus as easily as I can on my K750i. So I went for a sim only contract, keep my shitter of a phone, pay £20 a month, get 600 minutes, 600 texts and a free bolt on (you could choose something like free internet, free 02-02 calls, but I went for unlimited texts). And the type of sim I went for I can cancel at any time, you can get some cheaper options but they are minimum contract of a year. Oh and I also got to keep my same number.