In 1999 the Japanese firm NTT Do Co Mo released the first smartphones to achieve mass adoption within a country.
The first integration of data signals with telephony was conceptualized by Nikola Tesla in 1909 and pioneered by Theodore Paraskevakos beginning in 1968 with his work on transmission of electronic data through telephone lines.
In addition to placing and receiving cellular calls, the touch screen-equipped Simon could send and receive faxes and emails.It included an address book, calendar, appointment scheduler, calculator, world time clock and notepad, as well as other visionary mobile applications such as maps, stock reports and news.Before 2007, it was common for smartphones to have a physical numeric keypad or QWERTY keyboard in either a candybar or sliding form factor. introduced the i Phone, the first smartphone to use a capacitive multi-touch interface.but it was not a smartphone, and its screen was not multi-touch.) The i Phone was notable for abandoning the use of a stylus, keyboard, or keypad typical for smartphones at the time, in favor of a large touchscreen for direct finger input as its main means of interaction.Most of the "smartphones" in this era were hybrid devices that combined these existing familiar PDA OSes with basic phone hardware.
The results were devices that were bulkier than either dedicated mobile phones or PDAs, but allowed a limited amount of cellular Internet access.
Unlike future generations of wireless services, NTT Do Co Mo's i-mode used c HTML, a language which restricted some aspects of traditional HTML in favor of increasing data speed for the devices.
Limited functionality, small screens and limited bandwidth allowed for phones to use the slower data speeds available.
The trend at the time, however, that manufacturers competed on in both mobile phones and PDAs was to make devices smaller and slimmer.
The bulk of these smartphones combined with their high cost and expensive data plans, plus other drawbacks such as expansion limitations and decreased battery life compared to separate standalone devices, generally limited their popularity to "early adopters" and business users who needed portable connectivity.
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.