As the number of smartphones in the country has increased, the number mobile cellular subscriptions in the United States has increased. Subscription numbers rose from nearly 185 million in 2004, to just over 404 million in 2019. The number of mobile cellular subscriptions per 100 inhabitants puts this total figure in perspective. As recently as 2013 there were less than 100 smartphone subscriptions per 100 inhabitants, however, by 2018, there were 123.69 smartphone subscriptions for every 100 inhabitants.
AT&T has one of the highest ARPU – the average revenue generated by each user – amongst all wireless carriers in the U.S., and T-Mobile US has one of the lowest. Verizon and AT&T have the lowest churn rates in the American market.