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First ever mobile phone to feature software applications.
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Appeared as normal phones on the outside, and opened in clamshell format to access a qwerty keyboard
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Was he first device marketed as a "smartphone"
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Incorporated the ability to check the calendar while talking on the phone, dial directly from a list of contacts, and send emails.
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First to offer integrated voice calling.
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First commercial smartphone to use finger input as its main means of interaction, instead of a stylus, keyboard or keypad.
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Android smartphone, first major competitor to Apples iPhone