When AT&T first launched cell phone service in 1946, no one thought it would become as big as it is today, 60 years later late. These early cell phones weighed around 80 pounds, so they didn't have the handling capability of modern cell phones. By 1948, the service had approximately 5,000 customers across the United States. In 1973, Motorola introduced the first mobile phone that, weighing about 2.4 pounds, did not require heavy equipment to operate. It wasn't until 10 years later that Motorola released the first commercial cell phone, the DynaTAC. Over the years, these phones became more common and also less expensive until Apple introduced the iPhone, which wasn't technically the first smartphone, but it was the first to take off and make smartphones popular among almost all social groups. After 28 years of existence of cell phones, in 2011, there were on average 122 cell phone subscriptions per 100 inhabitants in developed countries. This increased use of cell phones has had both positive and negative effects on society in recent years (AT&T). It has hugely changed the way we communicate, but overuse can also cause problems ranging from addiction to headaches to social isolation. A few years ago, almost no one in public places used a cell phone like they do today. In reality, the only people constantly on the phone were business people. This slowly changed when it became popular among common people and totally changed the way society judges the use of smartphones in public. As John Dvorak states: In recent years, this has moved from disapproval to acceptance in places such as restaurants. Years ago restaurants were full of conversations around the table, today it's just one end of the spectrum. Often, at least one... middle of paper ...... Free dash cell phones. " Communications Of The ACM 56.4 (2013): 38-40. Business Source Elite. Web. December 10, 2013. Syed, Sumayya Firdous, and Abu Sadat Nurullah. “Mobile phone use and social lives of urban adolescents: a literature review Trends in Information Management 7.1 (2011: 1-18) December 9, 2013. Thomée, Sara, Annika Härenstam and Mats Hagberg. Young Adults – A Prospective Cohort Study BMC Public Health 11.1 (2011): 66-76 Web. First. 'Effect of self and others on young people's involvement with their mobile phones' Australian Journal of Psychology 62.4 (2010): 194-203 Academic Research Internet..