Virgin Mobile is a great and cheap provider – I posted the website a while ago – it is in the aechives. You can get a reconditioned phone from their website for $10. Anyway, your payment can be as low as $20 every 3 months – depending upon if you usse the phone for emergencies only or if you use it alot (it will be more per month then). It is a prepaid phone and has excellent service.
Their provider is Sprint (I believe). My sister had a Go-phone – the service wasn’t as good as Virgin mobile. It is 25 cents a minute.