I just activated an optimus v and set up an automatic charge each month to my credit card. I see that virgin mobile charged me $35 (plus tax) for the first monthly fee and another $35 (plus tax) for something called a top-up. Does anyone know what that is? The virgin mobile web site refers to top up as the purchase of air time but isn't that what the $35 charge is for? It sounds like some sort of way to collect cash in advance from me.