The document summarizes the development of mobile phones from their early origins to modern smartphones. It describes the first mobile phone released by Motorola in 1983 that weighed 2 pounds and had a half hour battery life. It then outlines some of the major developments like the first folding phone by Motorola in the late 1980s, the first smart phone by Motorola in the early 1990s, and the first camera phone by Nokia in the late 1990s. It concludes that now there is a wide variety of smartphones led by the iPhone and Galaxy models.