Method in mobile telephone systems in which a subscriber identity module (SIM) is allocated at least two identities which are selectively activated by the user
US6212372A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1997 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Jan 9, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W8/26
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus and a method for providing at least two identities to a subscriber unit of a mobile telephone system. A subscriber identity module (SIM) is provided which is inserted into the subscriber unit for selectively activating an identity. The module may be activated through a keypad on the subscriber unit allowing a subscriber to enter a code for selecting a specific identity, or it may be a card having a separate program circuit on either end so that when inserted into the unit with its first end, a first identity is activated, and when inserted into the unit with its second end, a second identity is activated. Each selected identity may be allocated a separate directory number or all identities may be allocated a single number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.