I bought a Blackberry Storm off of ebay. It didn't come with a sim card and I've used my friend's sim card and it still says "Install Sim Card" at the top of the screen. Clearly something is wrong with the phone and I might need to send it back. Do I need the sim card to use all features of the Blackberry (including internet)? I was told that the sim card is only needed when your overseas. If I can use the phone with all of its features without a sim card, I'll keep the phone. If not, I'll need to send it back.