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  2. Cellular frequencies in the United States - Wikipedia

    en.wikipedia.org/wiki/Cellular_frequencies_in...

    To issue cellular licenses, the FCC divided the U.S. into 734 geographic markets called Cellular Market Areas (CMAs) and divided the 40 MHz of spectrum into two, 20 MHz amounts referred to as channel blocks; channel block A and channel block B. A single license for the A block and the B block were made available in each market.

  3. Vertical service code - Wikipedia

    en.wikipedia.org/wiki/Vertical_service_code

    Call waiting disable *71 1171 Usage sensitive three-way call *72 1172 Unconditional forward: All calls *73 1173 Call forward: Cancel *74 1174 Speed calling (8 numbers) *75 1175 Speed calling (30 numbers) *77 1177 Anonymous call rejection activation *78 1178 Do not disturb *79 1179 Do not disturb disable *80 1180 Call blocking disable *81 1181 ...

  4. Verizon (wireless service) - Wikipedia

    en.wikipedia.org/wiki/Verizon_(wireless_service)

    Verizon is an American wireless network operator that previously operated as a separate division of Verizon Communications under the name Verizon Wireless. In a 2019 reorganization, Verizon moved the wireless products and services into the divisions Verizon Consumer and Verizon Business , and stopped using the Verizon Wireless name.

  5. Verizon - Wikipedia

    en.wikipedia.org/wiki/Verizon

    Verizon Communications Inc. (/ v ə ˈ r aɪ z ən / və-RY-zən), is an American telecommunications company headquartered in New York City. [3] It is the world's second-largest telecommunications company by revenue and its mobile network is the largest wireless carrier in the United States, with 146 million subscribers as of December 31, 2024.

  6. Mobile Telephone Switching Office - Wikipedia

    en.wikipedia.org/wiki/Mobile_Telephone_Switching...

    It is responsible for interconnecting calls with the local and long distance landline telephone companies, compiling billing information (with the help of its CBM/SDM), etc. It also provides resources needed to efficiently serve a mobile subscriber such as registration, authentication, location updating and call routing.

  7. Personal Communications Service - Wikipedia

    en.wikipedia.org/wiki/Personal_Communications...

    Verizon.com. Verizon Communications Inc. 2011. Archived from the original on 29 June 2011 Personal Communications Services (PCS) A new generation of wireless-phone technology that introduces a range of features and services surpassing those available in analog- and digital-cellular phone systems.