A METHOD FOR ALLOWING A USER OF A TERMINAL TO CHOOSE AN OPERATOR FOR DOWNLOADING A SUBSCRIPTION PROFILE, CORRESPONDING SERVERS AND SECURE ELEMENT

摘要

The invention concerns a method for allowing a user of a terminal (10) to choose an operator, the terminal (10) comprising a secure element containing an unique identifier and an ephemeral Ki, the method comprising: a- establishing a bidirectional communication channel between a server (131) and the secure element (11) for exchanging data and commands by: a1- Sending a first attachment request signaling message from the secure element to the server (131), the first attachment request signaling message comprising a MCC and a MNC of the server (131), and at least a part of a unique identifier of the secure element, the server (131) being provisioned with the unique identifier; a2- Sending from the server (131) to the secure element, in at least a first signaling message: - At least a command requesting the secure element to send the remaining part of its unique identifier if necessary; - A correlation identifier if further messages have to be sent from the secure element to the server (131); - A first payload comprising data; a3- Executing at the secure element the command; b- repeating steps -a1- to -a3- until the server (131) has received the unique identifier; c- Sending from the server (131) to the secure element in a signaling message a command prompting the user to select an operator; d- Sending from the secure element to the server (131) an identifier identifying the operator chosen by the user in another signaling message; e- Allocating by the server (131) a temporary IMSI (t-IMSI) from the selected operator to the secure element; f- Sending the temporary IMSI to the secure element with a command to replace its current IMSI by the temporary IMSI (t-IMSI) and provisioning the temporary IMSI (t-IMSI) and the ephemeral Ki (e-Ki) in another server (133) able to order a subscription profile to be downloaded to the secure element (11) from a provisioning server (134).