A postpaid plan is a type of mobile phone service where customers pay for their usage at the end of each billing cycle. This means users can enjoy their services, such as calls, texts, and data, without worrying about running out of credit. At the end of the month, they receive a bill that reflects their usage, which they must pay. These plans often come with a fixed monthly fee that includes a set amount of data, minutes, and texts. Customers may also have the option to add extra features or services, making postpaid plans flexible to meet individual needs.