3. Use statistics of carrier locked mobile in USA
Sales (in Millions)
Verizon Wireless AT&T Mobility T-Mobile US U.S. Celluler
*Data taken from Wikipedia
The number of mobile users are gradually increasing and can be forecasted to 5.07 billions in 2019.
Verizon Wireless: 140.1 million (Q4 2015)[2]
AT&T Mobility: 128.6 million (Q4 2015)[3]
T-Mobile US: 63.2 million (Q4 2015)[4]
U.S. Cellular: 4.9 million (Q4 2015)[2]