Postpaid refers to a payment system in which services or goods are provided first and payment is made at a later date. This is commonly used in the telecommunications industry, where customers are billed for their usage at the end of a billing cycle. Unlike prepaid plans, postpaid plans do not require customers to pay in advance for their services. Instead, they are billed for their usage after it has been incurred. This allows for greater flexibility and convenience for customers, as they do not have to constantly top up their accounts. However, it also means that customers are responsible for paying their bills on time to avoid any late fees or service interruptions. Postpaid plans often come with additional benefits such as discounted rates and unlimited usage, making them a popular choice for those who require consistent and reliable services.