Patent ID: 8095132

Claim:
A first subscriber identifying module including a microcontroller in a mobile telecommunication network which is configured to communicate with at least one remote system in the mobile telecommunication network, said first subscriber identifying module and said remote system being adapted to store at least one parameter identifying a user in the network, said first subscriber identifying module comprising: a one-time account identifier designed for a one-time logon to the network; a permanent account identifier, said permanent account identifier being deactivated and attached to the first subscriber identifying module; and another permanent account identifier, said another permanent account identifier being activated and attached to a second subscriber identifying module, wherein the another permanent account identifier is copied from the second subscriber identifying module to the first subscriber identifying module; wherein said one-time and another permanent account identifier are prestored in said at least one remote system, and wherein said microcontroller is programmed to: a) use the one-time account identifier to logon to the network when said first subscriber identifying module is switched on; b) exchange the one-time account identifier with the permanent account identifier in the first subscriber identifying module upon successful logon to the network as the active account identifier in the first subscriber identifying module; and c) upon successful logon to the network, send an activation request including the permanent account identifier and the another permanent account identifier to said at least one remote network for deactivating in said at least one remote network the another permanent account identifier attached to the second subscriber identifying module, wherein the step b) is performed in said first subscriber identifying module by an auto-activation application executed after receiving a message from the network informing a successful logon.