When you buy your SIM, you'll need to choose a plan. AT&T currently offers several competitive options:
Once you have your SIM card, activation only takes about 10 minutes: Affordable AT&T Prepaid Phone Plans & Devices -No Contract buy at&t prepaid sim card
that includes a 3-in-1 SIM card (standard, micro, and nano sizes) to fit almost any unlocked phone or tablet. Where to Buy Your SIM Card When you buy your SIM, you'll need to choose a plan