As the world becomes more connected, smartphone adoption on the rise. The Mobile Economy 2015 report, by the GSM Association, states that Smartphone devices accounted for 60% of connections in developed markets at the end of 2014, ranging from 51% in Europe to 70% in North America.
The popularity of mobile banking has risen alongside smartphone usage. According to a 2015 survey by the Board of Governors of the Federal Reserve System, 87 percent of the U.S. adult population has a mobile phone and 52 percent of smartphone owners with a bank account have used mobile banking in the 12 months prior to the survey.
http://bravenewcoin.com/news/ledgers-tee-trustlet-for-smartphone-bitcoin-wallets-released/
