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Key pad of a Nokia 3720. Besides the number keypad and buttons for accepting and declining calls (typically from left to right and coloured green and red respectively), button mobile phones commonly feature two option keys, one to the left and one to the right, and a four-directional D-pad which may feature a center button which acts in resemblance to an "Enter" and "OK" button.
Mobile phones offering only basic features are often referred to as feature phones (slang: "dumbphones"), while those with advanced computing power are known as smartphones. [1] The first handheld mobile phone was demonstrated by Martin Cooper of Motorola in New York City on 3 April 1973, using a handset weighing c. 2 kilograms (4.4 lbs). [2]
Feature phones tend to use an embedded operating system with a small and simple graphical user interface, unlike large and complex mobile operating systems on smartphones. The functions of feature phones are limited compared to smartphones. Following the rise of smartphones, the feature phone has sometimes been referred to as a dumbphone. [2]
Nextel also offers a feature on some of their phones, marketed as DirectTalk. The technology uses the 900 MHz ISM band and provides ten FHSS channels for an off-network push to talk communications between individual phones that are not necessarily in range of wireless towers.
4G is the current mainstream cellular service offered to cell phone users, performance roughly 10 times faster than 3G service. [4] One of the most important features in the 4G mobile networks is the domination of high-speed packet transmissions or burst traffic in the channels.
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Voice-based features Google search through voice has been available since initial release. [6] Voice actions for calling, texting, navigation, etc. are supported on Android 2.2 onwards. [7] As of Android 4.1, Google has expanded Voice Actions with ability to talk back and read answers from Google's Knowledge Graph when queried with specific ...
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