Patent ID: 8644825

Claim:
A method for customising a terminal for a definitive period or for a predetermined duration related to a subscription, said method comprising: selecting a customisation data set for said terminal, from among a plurality of customisation data sets, each of the plurality of customisation data sets being specific to a different Public Land Mobile Network (PLMN), and each of the plurality of customisation data sets including at least one of said following elements: an International Mobile Subscriber Identity number (IMSI), an authentication key Ki and an authentication algorithm, activating the selected customisation data set, in order to allow for a link of said terminal with a PLMN to which the selected customisation data set is specific, wherein the method comprises the following steps, carried out a single time during a first use of said terminal: placing in an actual environment of use of said terminal, with no customisation data set selected and activated for said terminal; and after placing the terminal in the actual environment of use, obtaining carrier information pertaining to carriers received by said terminal from a network scan, each carrier being associated to a distinct PLMN geographical cell; wherein said step of selecting is carried out after obtaining the carrier information, and according to at least one selection criterion applied to the carrier information obtained and said steps of obtaining carrier information and selecting a customisation data set are carried out by said terminal; and wherein the method comprises a step of confirming or not confirming the selection carried out by the terminal, comprising the following steps: the terminal sends to a server a message indicating the customisation data set selected for said terminal; and when said server confirms the selection carried out by the terminal said server sends to the terminal a response that confirms to the terminal the selection carried out by the terminal, and when the server does not confirm the selection carried out by the terminal said server sends to the terminal a response that requests that the terminal replace the customisation data set selected for said terminal with another customisation data set.