For North American TDMA and CDMA phones, dual-band indicates that the phone will work in both the 800/850 MHz band and the 1900 MHz band. Most current TDMA phones in the U.S. are tri-mode ...
The company offered service under the Cellular One brand in most regions. Although originally a TDMA carrier in most areas, the company migrated to GSM technology.
There were different requirements, and as a result the system, although digital and using Time-Division Multiple Access (TDMA) techniques, is very different. The FCC had indicated that no new ...
North American TDMA (NA-TDMA) is a digital cellular system [22] [23] [24] sometimes called American digital cellular (ADC) or digital AMPS (DAMPS), or North American digital cellular (NADC) or IS-54 ...
All GSM phones and most iDEN phones require a SIM card to operate. There are certain types of phones (CDMA, TDMA, AMPS) that do not use a SIM. Instead, the required data is programmed directly ...