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In 1971, while he was working with Boeing in Huntsville, Alabama, Paraskevakos demonstrated a transmitter and receiver that provided additional ways to communicate with remote equipment.
This formed the original basis for what is now known as caller ID.
Since 2010, smartphones adopted integrated virtual assistants, such as Apple Siri, Amazon Alexa, Google Assistant, Microsoft Cortana, Black Berry Assistant and Samsung Bixby).
Most smartphones produced from 2012 onward have high-speed mobile broadband 4G LTE capability.
It had a 640×200 resolution CGA compatible four-shade gray-scale LCD screen and could be used to place and receive calls, and to create and receive text messages, emails and faxes.
The first commercially available device that could be properly referred to as a "smartphone" began as a prototype called "Angler" developed by Frank Canova in 1992 while at IBM and demonstrated in November of that year at the COMDEX computer industry trade show.
A refined version was marketed to consumers in 1994 by Bell South under the name Simon Personal Communicator.
The two components were attached by a hinge in what became known as a clamshell design, with the display above and a physical QWERTY keyboard below.
The PDA provided e-mail; calendar, address book, calculator and notebook applications; text-based Web browsing; and could send and receive faxes.