It thought I was saving time by buying my card online instead of having to go out to the store and get one, but I was WRONG! Don't get me wrong, the phone and cards are great, but be careful if you purchase your Top-Up cards online!! If it takes more than 72 hours between the time you order the card (activated by Amazon at time of purchase/shipping) and the time you receive it, the pin # will "go cold" and it shows up as an invalid pin # when you try to top-up. You won't be able to use it without faxing a bunch of information and a copy of the card to Virgin Mobile Customer Service. I went through this recently and it was a real PAIN! I'll be purchasing my cards at my local store from now on.