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...http://www.google.fr/patents/US7151922?utm_source=gb-gplus-shareBrevet US7151922 - Mobile telephone using subscriber card
