A postpaid phone plan is a type of mobile service agreement where customers pay for their usage at the end of each billing cycle. This means users receive a monthly bill that reflects their calls, texts, and data usage. Postpaid plans often come with a contract, which may include a subsidized phone or device. These plans typically offer more extensive features compared to prepaid options, such as higher data limits and additional perks like international roaming. Customers usually enjoy better customer service and the ability to upgrade their devices more frequently through programs offered by carriers like Verizon, AT&T, or T-Mobile.