Virgin uses the Sprint network. Their plans are just significantly cheaper and offer no-contract billing. You don't have to pre-pay either...can set it up on month-to-month. It's the best deal going here. I cut my phone bill (compared to Verizon) in half and get web/email with it (my almost $70 Verizon plan didn't come with data or email). I couldn't be happier with the deal I'm getting.