Cingular Frequency bands

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Frequency Bands Licensed to Cingular

Cingular currently uses some of the spectrum allocated by the FCC for use in the United States in mobile communications. The currenty listed frequencies given to GSM mobile operators in the USA are from 824MHz-849MHz(uplink) and 869-894MHz(downlink) in the GSM 850 Bands as well as the PCS 1900 Bands from 1850MHz-1910MHz(uplink) and 1920MHz-1990MHz(downlink). The 800MHz range is limited to 2 watts of power in the handset, while the 1900MHz range is limited to 1 watt. This may explain why the 800MHz band often seems to have better performance in some areas.

Here are some links to more general info on USA Cellular Frequencies:

FCC Web Site Cellular Infomation[1]

Cellular Frequencies on Wikipedia [2]

Also, rather than detail at length all the specifics for current mobile networks in the USA, here are some links to more WIKI articles relevant to the subject matter:

D-AMPS System[3]

CDMA First Generation System[4]

GSM Cellular Systems[5]

GPRS Mobile Data Service[6]

EDGE Data Service[7]

PCS (Personal Communications Service) on Wiki[8]

If you're wondering why Cingular will use the 850/1900 bands for UTMS/HSDPA services, it appears that one of the biggest reasons that the 2100MHz band will not be allocated for 3G cellular service in the USA very soon because of the lack of available channels in many markets (due to 5MHz channel width requirements). Strangely enough, there is also the possibility as well for major interference with any mobile units operating on 2100MHz in the Mojave area, caused by the operation of NASA's Goldstone facillity to command deep space vehicles: link to FCC text[9]

---This above text was added on Nov. 18, 2006---
--C. Rosenberg 01:50, 18 November 2006 (EST)

You can add to this text with a descriptive paragraph(s) explaining the following:

-GSM Frequency bands used by Cingular and explain that some markets use one band while some other markets use both.
-GSM Frequency bands used overseas and why Cingular is not licensed for those international bands. -Issues when bringing an international phone to the US.
-Why it is called 850Mhz and not 800Mhz anymore.