AT&T, Verizon, T-Mobile, and Sprint are all wireless serivce providers that have been prevelant in the market for quite some time.
T-Mobile Reports Record Financial Results Across the Board for FY 201 7, Issues Strong Guidance for 2018 and Beyond, T-Mobile, 7 Feb. 2018, www.t-mobile .com/news/tmus-q4-2017-earnings.
A Merged T-Mobile and Sprint Will Still Be Smaller than ATT or Verizon, Recode, 30 Apr. 2018, www.recode.net/2018/4/30/17300652/tmobile- sprint-att-verizon-merger-wireless-subscriber-chart.
T-Mobile in a Position to Grow Its Market Share with Millennials, Says Report, TmoNews, 9 Mar. 2018, www.tmonews.com/2018/03/t-mobile-grow -market-share-millennials-report/.
Sprint and T-Mobile Have a $27 Billion Problem to Solve, Bloomberg , 3 May 2018, www.bloomberg.com/news/articles/2018-05-03/sprint-and-t-mobile -have-a-27-billion-problem-to-solve.
Verizon Has the Best Network, According to Another New Ranking, Fortune, 7 Feb. 2018, fortune.com/2018/02/07/verizon -ranking-wireless-rootmetrics/.
Verizon Clears Capital for 5G Investment by Laying Off 10,400 Workers, Multichannel, 10 Dec. 2018, www.multichannel.com/news/verizon-lays -off-10400-workers.
Verizon: Technology Leadership and Innovation, Verizon, 16 Feb. 2018, www.verizon.com/about/news/verizon-technology-leadership-and -innovation.
Verizon’s New CEO Weighs Top-Level Shake-Up in 5G Push, Bloomberg, 9 Oct. 2018, www.google.com/url?q=https://www.bloomberg.com/news/articles/2018 -10-09/verizon-s-new-ceo-is-said-to-weigh-top-level-shake-up-in-5g-pushsource =gmailust=1544761190126000usg=AFQjCNFsxV8eZQ2Xc5m-2qpTwg5qphZz6Q.
Verizon Customers in Four Cities Are Officially Getting 5G-Based Internet Service Today, The Washington Post, 1 Oct. 2018, www.washingtonpost .com/technology/2018/10/01/verizon-customers-four-cities-are-officially -getting-g-based-internet-service-today/?noredirect=onutm_term= .6b5c8b0cb652.
Why ATT Stock Fell 17.4% in the 1st Half of 2018, The Motley Fool, 17 July 2018, www.fool.com/investing/2018/07/17/why-att-stock-fell-174-in -the-1st-half-of-2018.aspx.
ATT Wins: Judge Approves $85.4 Billion Time Warner Acquisition, NBC News, 12 June 2018, www.nbcnews.com/business/business-news/t-wins-judge -approves-85-4-billion-time-warner-acquisition-n882406.
ATT, Sprint, T-Mobile and Verizon Unveil First-Look at Future of Mobile Authentication, ATT, 12 Sept. 2018, about.att.com/story/2018/future _of_mobile_authentication.html.
Can Sprint Maintain Its Subscriber Momentum?, Forbes, 2 Aug. 2018, www.forbes.com/sites/greatspeculations/2018/08/02/can-sprint-maintain-its -subscriber-momentum/#78a602205053.
Sprint Ups Mobile Hotspot to 50GB, Turns on Faster 4G LTE Network before 5G Arrives in 2019, USA Today, 6 Nov. 2018, www.usatoday.com/story /tech/2018/11/06/sprint-ups-mobile-hotspot-limits-50-gb-launches-faster-4-g-network/1898490002/.
Defining Massive MIMO in a 5G World, Microwaves RF, 30 Oct. 2017, www.mwrf.com/systems/defining-massive-mimo-5g-world.