And many countries allow competition in cellular telephony.
In India, Bharti Airtel has trumped Vodafone as the market leader in cellular telephony.
The emergence of cellular telephony provides important spectrum occupancy at 900 MHz frequency band.
J.A. Reeds III, ''Cryptosystem for Cellular Telephony," U.S. Patent 5,159,634, Sep 1991.
The result would be a new type of hand-held device blending aspects of network computing and traditional cellular telephony.
Cellular telephony has gone from nothing to 3.7m users.Yet telecoms still demand vast investment.
Marty Cooper, ArrayComm's chief executive, who pioneered cellular telephony at Motorola, smells a rat.
So, in 1988, Dr Jacobs decided to apply it to terrestrial cellular telephony instead.
As the US cellular telephony industry has boomed, the need for security has increased: both for privacy and fraud prevention.
The earliest U.S. cellular telephony systems relied on the high cost of cellular-capable receivers (or scanners) for security.
Millions in Africa have simply bypassed traditional infrastructure stages such as landlines and branch banking, skipping straight to cellular telephony and mobile money.
