Motorola Mobility LLC

Scott P Debates

Joel D Voss

Kent D Rager

A method for controlling subsidy locking of a handset device includes storing, in a handset device, an asymmetrically digitally signed subsidy unlock data block that has been modified based on a password after signing (); modifying the stored unlock data block based on a received subsidy unlock password (); and granting subsidy unlock status if the asymmetric digital signature of the modified, stored unlock data block properly verifies (). A method () for controlling subsidy locking of a handset device includes storing, in the handset device, an asymmetrically digitally signed subsidy unlock data block that comprises a password portion that has been modified after signing (); replacing the contents of the modified password portion with a received subsidy unlock password to produce an updated subsidy unlock data block (); and granting subsidy unlock status if the asymmetric digital signature of the updated subsidy unlock data block properly verifies ().

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Vernon Hills, IL, United States of America

Scott P Debates