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".
Firefly (mobile phone) Firefly (mobile phone) Firefly is a cellphone aimed at parents to give to their children aged 5–12 years. The address book button has up to 48 phone numbers in it. These are to be programmed in by the guardian/parent, who knows a PIN which is intended to keep the child from changing the numbers. In this way, parents control who their kids are calling. The phone also offers a call screening option which, when activated only allows the numbers that are in the phone's memory to call that phone. The standard features of the phone are up to 8.5 days