Mobile phone commercially available handheld mobile phone. From 1983 to 2014, worldwide mobile phone subscriptions grew to over seven billion—enough to provide one for every person on Earth. In first quarter of 2016, the top smartphone developers worldwide were Samsung, Apple, and Huawei, with smartphone sales represented 78 percent of total mobile phone sales. For feature phones (or "dumbphones") , the largest were Samsung, Nokia, and Alcatel. A handheld mobile radio telephone service was envisioned in the early stages of radio engineering. In 1917, Finnish inventor Eric Tigerstedt filed a patent for a "pocket-size folding telephone with a very thin carbon microphone".
Mobile phone content advertising respondents expected successful advertising models to cut prices or fund the consumption of entertainment content on mobile phones. While advertising via a mobile phone is still relatively new, inventors have developed ways to use a mobile phone to present advertising to persons standing near a mobile phone user while the user speaks in a non-handsfree mode. Bayne's invention (Bayne, U.S. Pat. Application Nos. 20050239448 & 20050239495)teaches providing a mobile phone user with incentives (e.g. discounted talk time, free content, etc.) for allowing the phone to be used as a mini-billboard by manipulating the main screen to face outward to present