Abstract: A process for dynamic management of subscription data for a terminal in a “prepaid” mode as part of a telecommunication network, in which a customer in possession of, or using, the terminal acquires two numbers for activating the terminal and/or crediting the terminal account. The two numbers could be acquired from a pre-paid card, for example, with the numbers hidden until a covering is scratched off by the users. The terminal must be activated on the network by first entering a authentication key, whereby the terminal obtains an identity on the network. The customer can then add an account number that creates and/or credits the terminal account on the network, whereby the terminal obtains a call number from the network. The customer can add credit to his account by purchasing additional pre-paid cards.