Nathaniel C Roberts

US Patent:

61415642, Oct 31, 2000

Filed:

Sep 30, 1999

Appl. No.:

9/409359

Inventors:

John David Bruner - Barrington IL
Eric Edward Payne - Urbana IL
Richard Allen Pace - Champaign IL
Nathaniel David Roberts - Urbana IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 138

US Classification:

455558

Abstract:

Method and apparatus for sharing a SIM card between two masters. The invention may be embodied in so-called multi-mode radiotelephones that use SIM cards to store and access information. The multi-mode radiotelephone includes at least two master components and a single SIM card. The method and apparatus synchronizes and coordinates communications from either master component directly to the SIM card, thereby allowing a single SIM card to directly service two master components.