Method of limiting access to the data stored in a cellular telephone
US6259908A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1996 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Nov 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of limiting access to data of a cellular telephone. The method of limiting access may be accomplished by defining in the cellular telephone a subsidy lock code for use in activating the cellular telephone on the designated cellular network. The step of defining occurs before the cellular telephone is activated on a cellular network. The subsidy lock code is defined in manner that prevents the subsidy lock code from being erased using the keypad of the cellular telephone. When procedures are initiated by an entity for activating the cellular telephone on the cellular network, the entity must demonstrate knowledge of the subsidy lock code. Upon demonstration of knowledge of the subsidy lock code, the cellular telephone may be activated on the cellular network by the entity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.