公开(公告)号：US20190332813A1

公开(公告)日：2019-10-31

申请号：US16465540

申请日：2016-12-20

Applicant: SONY MOBILE COMMUNICATIONS INC.

Inventor： David BERTHET ,  Rickard LJUNG

IPC: G06F21/70 ,  G05B19/042 ,  H04W12/06

Abstract: System for controlling usability of an electronic device (1), which host device comprises a processing unit (2), the system comprising a first control module (10), connected to the processing unit, said first control module comprising a modem (11) for communicating with a cellular network, and an access circuit (101) connected to the modem for cellular network access, which access circuit comprises a first secure element (12); a second control module (41) comprising a second secure element (411), configured to communicate with the first secure element over a communication link; wherein said access unit is configured to realize a state machine configured to set a usability state dependent on communication between the first secure element and the second secure element, and to control the device in accordance with said usability state.