Problem Setting Up iPhone 5s I just purchased an iPhone (on Sprint), my first one, off of Craigslist. However I am having a problem: I get home and connect it to Wi-Fi and it says I need a SIM card. I looked online a bit to see if I can buy one, but I've heard if you go to Apple you'll get into trouble with them. I took a screenshot of the Craigslist ad, just in case. I was wondering if there's a way to buy a SIM card. I think it's a used phone, but on the ad it says new but out doesn't look new, if it makes a difference. I really want to know where can I get a SIM card, how will I be able to use it, how much it is, etc.
Go to a shop selling Sprint contracts/SIMs and buy one.