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2. Call blocking - Wikipedia

   en.wikipedia.org/wiki/Call_blocking

   Call blocking. Call blocking, also known as call block, call screening, or call rejection, allows a telephone subscriber to block incoming calls from specific telephone numbers. This feature may require an additional payment to the subscriber's telephone company or a third-party. Call blocking is desired by individuals who wish to block ...

3. National Do Not Call Registry - Wikipedia

   en.wikipedia.org/wiki/National_Do_Not_Call_Registry

   The National Do Not Call Registry is a database maintained by the United States federal government, listing the telephone numbers of individuals and families who have requested that telemarketers not contact them. [1] Certain callers are required by federal law to respect this request. Separate laws and regulations apply to robocalls in the ...

4. Sprint Corporation - Wikipedia

   en.wikipedia.org/wiki/Sprint_Corporation

   Sprint Corporation. Sprint Corporation was an American telecommunications company. Before being acquired by T-Mobile US on April 1, 2020, it was the fourth-largest mobile network operator in the United States, serving 54.3 million customers as of June 30, 2019. [3]

5. Cellular frequencies in the United States - Wikipedia

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

   There are 51 MTAs, 493 BTAs and 175 EAs in the United States. The Advanced Wireless Services (AWS) bands, auctioned in the summer of 2006, were for 1,710–1,755 MHz, and 2,110–2,155 MHz. The spectrum was divided into blocks: A blocks were for Cellular Market Areas, based on existing cellular (1G) licenses, and were 2 × 10 MHz.

6. Traffic pumping - Wikipedia

   en.wikipedia.org/wiki/Traffic_pumping

   Traffic pumping, also known as access stimulation, is a controversial practice by which some local exchange telephone carriers in rural areas of the United States inflate the volume of incoming calls to their networks, and profit from the greatly increased intercarrier compensation fees to which they are entitled by the Telecommunications Act of 1996.

7. Sprint employees charged in $15 million cell phone scam - AOL

   www.aol.com/news/2010-09-10-sprint-employees...

   September 10, 2010 at 5:00 PM. Sprint workers charged in cell phone cloning. Nine former Sprint employees have been charged with accessing thousands of customer accounts to make millions of ...