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The GSM is expanded as a Global System for Mobile communication.CDMA is used as a spread spectrum for mobile networks that allows multiple wireless users to transfer or spread the airwaves with alternate methods. LTE can be expanded as Long term evolution.

Global System for Mobile Communications (GSM, around 8085% market share) and IS-95 (around 1015% market share) were the two most prevalent 2G mobile communication technologies in 2007.GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM.

(area code) (phone number) or (XXX)- XXX - XXXX....An example of a US phone number00 - the exit code to dial outside the States.1 - the US country code.202 - the local DC area code.588-6500 - the rest of the embassy's number.18 Jul 2018

44 is the country code for the UK. 0 is the long distance dialling code within the UK, from STD (subscriber Trunk Dialling) used to access the 'long distance' or trunk network. You don't need it if dialling the UK from overseas as the call arrives already on the trunk network.

Following the +1 would be a three-digit area code, or a Numbering Plan Area (NPA) code. After the three-digit NPA code would be a three-digit NXX (or exchange) indicating a central office of 10,000 numbers, followed by a four-digit subscriber telephone line number.

The UK mobile phone number '07911 123456' in international format is '+44 7911 123456', so without the first zero....To use the previous example:Country code: +44.National destination code: 7911.Subscriber number: 123456.The result: +447911123456.Nov 27, 2020

A telephone prefix, also called an exchange code or central office code, is a three-digit code that identifies a much smaller region within an area code. The prefix can refer to a specific city or a section of a city.