Credit ratings & contract Mobile Phones?

I’m 20 now, never had a credit card or anything like that, not needed one. My motto has been if I haven’t got the cash for it then I cant afford it. But I need a new phone now, and want a half decent one, but I haven’t got hundreds of pounds spare to throw around. So I decided to go contract, but I cant do that because I have’t got a "credit rating". surely the fact I’ve never needed one is a good thing.

I can get a contract but it will have to be in someone elses name for a bit. But I dunno if I should get a credit card, so that I can get a good raiting once I pay it all off, or can you get a credit rating from having a contract phone?

Thanks in advance

Get a Metro Pcs Phone no contracts and ur bill is the same Every Month!!