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2. History of the telephone - Wikipedia

   en.wikipedia.org/wiki/History_of_the_telephone

   [43] [44] MOS telephone technology introduced a new feature: the use of MOS memory chips to store phone numbers, which could then be used for speed dialing at the push of a button. [ 43 ] [ 44 ] [ 45 ] This was demonstrated in the United Kingdom by Pye TMC, Marcno-Elliot and GEC in 1970.

3. Martin Cooper (inventor) - Wikipedia

   en.wikipedia.org/wiki/Martin_Cooper_(inventor)

   Reporters and onlookers watched as Cooper dialed the number of his chief competitor Dr. Joel S. Engel at AT&T. [23] "Joel, this is Marty. I'm calling you from a cell phone, a real handheld portable cell phone." [24] That public demonstration landed the DynaTAC on the July 1973 cover of Popular Science Magazine. [15]

4. Vivo (technology company) - Wikipedia

   en.wikipedia.org/wiki/Vivo_(technology_company)

   In June 2020, the cybercrime unit of Meerut Police revealed that more than 13,500 Vivo smartphones used in India were running on the same IMEI number. The IMEI number is a 15-digit code meant to be unique to every mobile device communication administration, that may be used for tracking criminals or stolen mobile phones.

5. BlackBerry Mobile - Wikipedia

   en.wikipedia.org/wiki/Blackberry_mobile

   BlackBerry Mobile was a trading name used by TCL Communication between December 2016 and August 2020 to manufacture and sell BlackBerry-branded devices worldwide, excluding the regions where BB Merah Putih (Indonesia) and Optiemus Infracom (India, Bangladesh, Sri Lanka and Nepal) operated.

6. iPhone - Wikipedia

   en.wikipedia.org/wiki/IPhone

   The program aims to increase the number of customers who purchase iPhones at Apple Stores rather than carrier stores. [122] In 2015, Apple unveiled the iPhone Upgrade Program, a 24-month leasing agreement, which Fortune described as a "change [in] iPhone owners' relationships with mobile carriers".

7. Sprint Corporation - Wikipedia

   en.wikipedia.org/wiki/Sprint_Corporation

   A number of lawsuits between SPC and AT&T took place throughout the 1970s; the majority were decided in favor of increased competition. [28] Prior attempts at offering long-distance voice services had not been approved by the U.S. Federal Communications Commission (FCC), although a fax service (called SpeedFAX) was permitted.