How should I buy an iPhone 5s?

[dr1115]

iPhones do have sim cards and their is a sim slot in the side and you can access. I don't recommend that though going through Straight Talk. Pay the $200 minimally for it through a provider and just get a contract. In the end it'll save and avoid stress and get a quality service. Basically every smartphone off contract costs minimally $450 and the iPhone at least $600. Worst case scenario pay for services where you can upgrade your phone early if you really don't think you'll want it that long. Plus the iPhone has a different sim card than most other smartphones have anymore.