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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.
The first caller ID equipment was installed at Peoples' Telephone Company in Leesburg, Alabama and was demonstrated to several telephone companies.
The original and historic working models are still in the possession of Paraskevakos.
Smartphones were still rare outside Japan until the introduction of the Danger Hiptop in 2002, which saw moderate success among U. In Asia, with the exception of Japan, the trend was similar to that of Europe.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.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.