(You may have to hunt around for the “prepaid” section of these cell phone companies’ websites to bypass the flagship plans and get to cheaper stuff.) AT&T prepaid: Unlimited talk and text ...
Generally, AT&T deals entail purchasing the phone on an instalment plan and getting a data plan at a specific level (like AT&T's Unlimited Starter plan), then AT&T will give you monthly rebates ...
AT&T's Unlimited + 10GB hotspot prepaid plan ... that has become more widely available for prepaid plans. A prepaid phone plan is one you pay for in advance at the beginning of the month.