Patent ID: 8468260

Claim:
A method for changing a selected home operator (SHO) of a machine to machine (M2M) equipment, comprising: the machine to machine equipment (M2ME) establishing a connection with a registered operator (RO) through a trusted environment (TRE) functional entity, and the RO registering the M2ME in a new selected home operator (SHO); after a verification of the M2ME by the new SHO via a platform Validation Authority (PVA) is passed successfully, the new SHO sending a new International Mobile Subscriber Identity (IMSI) to the RO or authorizing the RO to provide a new IMSI; the RO sending the new IMSI to the M2ME with a connection established by the TRE functional entity; the M2ME using the new IMSI to replace an old IMSI in a Universal Integrated Circuit Card (UICC); wherein, the UICC and the TRE functional entity are located in the M2ME.