Cellular telephone responsive to service availability for...

Details Cellular telephone responsive to service availability for... Cellular telephone responsive to service availability for...

H - Electricity

04

B

325/17

H04B 1/40 (2006.01) H04B 7/26 (2006.01) H04M 1/00 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2019000

CELLULAR TELEPHONE RESPONSIVE TO SERVICE AVAILABILITY FOR OPERATING ON DIFFERENT CELLULAR TELEPHONE SYSTEMS Abstract of the Disclosure A unique dual-system cellular telephone includes a transceiver (100) having a dual bandwidth receiver, an audio/logic unit (200) having dual control programs, and a handset unit (300). The dual bandwidth receiver of the transceiver (100) has different filters (408 and 410) in the intermediate frequency section thereof which are switchably selected depending on which cellular telephone system is available. When service is not available in one of the cellular telephone systems, the unique cellular telephone automatically switches the receiver bandwidth and control program for operating on the other cellular telephone system.

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