Method and apparatus for establishing activation date for a cell

Details Method and apparatus for establishing activation date for a cell Method and apparatus for establishing activation date for a cell

1996-08-16

1999-04-13

Vo, Nguyen

Telecommunications

Radiotelephone system

Programming control

455410, 455575, H04M 300

Patent

active

058945962

ABSTRACT:
An apparatus and method to determine the warranty period for a cellular telephone based on the date on which the telephone was first activated for use in a cellular telephone network. The apparatus includes a cellular telephone having a non-volatile memory, and a section allocated for activation data within that memory. Within the memory area allocated for activation data is stored the first date on which the telephone was activated. The memory location for receiving the first date of activation is protected from being rewritten during subsequent activations of the cellular telephone by a date.

REFERENCES:
patent: 5046082 (1991-09-01), Zicker et al.
patent: 5060295 (1991-10-01), Borras et al.
patent: 5386468 (1995-01-01), Akiyama et al.

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