A subscription plan is a long-term contract between the customer and the operator, where the customer pays a monthly fee for unlimited or limited data, voice minutes, and text messages. In this case, the customer can choose a monthly or bi-monthly billing cycle.A Prepayment plan, on the other hand, does not require a contract and is paid for in advance. The customer pays a certain amount of money and uses the service until the balance runs out, after which they can add more credit to continue using the service. This option is ideal for people who do not want to be tied to a long-term contract or who prefer to control their monthly expenses.