Invention Grant
- Patent Title: Multi-factor autonomous sim lock
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Application No.: US17211265Application Date: 2021-03-24
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Publication No.: US11558751B2Publication Date: 2023-01-17
- Inventor: Ginger Chien , Richard Zaffino
- Applicant: AT&T Intellectual Property I, L.P.
- Applicant Address: US GA Atlanta
- Assignee: AT&T Intellectual Property I, L.P.
- Current Assignee: AT&T Intellectual Property I, L.P.
- Current Assignee Address: US GA Atlanta
- Agency: Guntin & Gust, PLC
- Agent Kenneth Kwan
- Main IPC: H04W12/00
- IPC: H04W12/00 ; H04L29/06 ; H04W12/72 ; H04L9/40 ; H04W12/06 ; H04W12/61 ; H04W12/60 ; H04W12/64

Abstract:
Aspects of the subject disclosure may include, for example, initializing a secure timer in a wireless device, determining whether a subscriber identification module (SIM) card installed in the wireless device comprises a carrier identity that matches a carrier identity stored in the machine-readable medium, establishing a network connection with a trusted server, starting the secure timer if the SIM card and network connection are satisfactory, periodically checking the network connection and SIM card until expiry of the secure timer, penalizing the secure timer responsive to a failure of the network connection or SIM card check, and responsive to expiry of the secure timer, unlocking a SIM lock. Other embodiments are disclosed.
Public/Granted literature
- US20210211882A1 MULTI-FACTOR AUTONOMOUS SIM LOCK Public/Granted day:2021-07-08
Information query