Mobile telephone using subscriber card

Details Mobile telephone using subscriber card Mobile telephone using subscriber card

2006-12-19

2006-12-19

Feild, Joseph (Department: 2617)

Telecommunications

Radiotelephone system

Message storage or retrieval

C455S558000, C235S441000, C709S217000, C439S159000

Reexamination Certificate

active

07151922

ABSTRACT:
Private data in an EEPROM (14) is erased in a data erasing procedure when pulling out an SIM card (2) from a mobile telephone (1). Before being erased, the private data is encrypted in an encryption procedure and it is transferred and recorded to an external memory (3). The private data encrypted and recorded to the external memory can be reused when the SIM card is used in another mobile telephone. Furthermore, it is possible to prevent the external memory from being left behind when the SIM card is pulled out by interfacing a lock mechanism of a card mounting section (16) with that of a memory mounting section (17).

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patent: S62-007251 (1987-01-01), None
patent: 2000-308126 (2000-11-01), None

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