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Note: the 27.555 MHz, 27.615 MHz, 27.635 MHz, 27.655 MHz, 27.765 MHz and 27.860 MHz frequencies have no active licenses for any of them. No expired, canceled or terminated licenses exist in the FCC database, indicating that legal users have abandoned the 27.555 MHz - 27.86 MHz frequencies for at least 30 years.
The 800 MHz frequency band is a portion of the electromagnetic spectrum, or frequency band, that encompasses 790–862 MHz.. Being a part of the spectrum known as "UHF Bands IV and V" (i.e. 470 MHz to 862 MHz) it was allocated by the ITU to Broadcasting as the primary user in Region 1 and was used for analogue television broadcasting before changing to digital terrestrial television in many ...
(MHz) Common name Subset of band Uplink [C 2] (MHz) Downlink [C 3] (MHz) Duplex spacing (MHz) Channel bandwidths (MHz) Notes 6 FDD 800 UMTS 800 5, 19, 26 830 – 840 875 – 885 45 5, 10 9 FDD 1800 UMTS 1700 3 1749.9 – 1784.9 1844.9 – 1879.9 95 5, 10 10 FDD 1700 Extended AWS 66 1710 – 1770 2110 – 2170 400 5, 10, 15, 20 22 FDD 3500 C ...
The 1850–1990 MHz PCS band is divided into six frequency blocks (A through F). Each block is between 10 MHz and 30 MHz in bandwidth. License (A or B) is granted for Major Trading Areas (MTAs). License (C to F) is granted for Basic Trading Areas (BTAs). License (G), where issued, is granted for Economic Areas (EAs).
The 800 MHz band (851-866 MHz) is heavily used in most of the US. Frequencies are reserved for Public Safety and for Industrial users. The 900 MHz band (935-940 MHz) is available solely for Industrial users. Finally, Public Safety entities are allotted an exclusive band of frequencies at 758-806 MHz.
Many GSM phones support three bands (900/1,800/1,900 MHz or 850/1,800/1,900 MHz) or four bands (850/900/1,800/1,900 MHz), and are usually referred to as tri-band and quad-band phones, or world phones; with such a phone one can travel internationally and use the same handset. This portability is not as extensive with IS-95 phones, however, as IS ...
Hillsdale County voters will be asked Aug. 6 to reconsider a ballot measure aimed at funding upgrades to the county's emergency radio technology.
As a more recent example the Apple iPhone 5 and iPhone 4S support quad-band GSM at 850/900/1800/1900 MHz, quad-band UMTS/HSDPA/HSUPA at 850/900/1900/2100 MHz, and dual-band CDMA EV-DO Rev. An at 800/1900 MHz, for a total of 'six' different frequencies (though at most four in a single mode).