The first smart phone was a mobile phone named "Tiantuo A6 188" produced by Motorola in 2000. It is the first PDA mobile phone with touch screen in the world, and it is also the first mobile phone with Chinese handwriting recognition input.

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Features of smart phones:

1. Wireless Internet access: CDMA 1X or 3G(WCDMA, CDMA-2000, TD-CDMA) networks or even 4G(HSPA+, FDD-LTE, TDD-LTE) networks need to support CDMA networks under GPRS or GSM networks.

It has the functions of PDA, including PIM (Personal Information Management), schedule, task arrangement, multimedia application and web browsing.

3. Open operating system: With independent core processor (CPU) and memory, more applications can be installed, and the functions of smart phones can be expanded infinitely.

4. Humanization: The machine functions can be expanded according to individual needs. According to personal needs, real-time expansion of the built-in functions of the machine, as well as software upgrade and intelligent identification of software compatibility, realize the humanized function of software market synchronization.

5. Powerful function: strong expansibility and more third-party software support.

6. Fast running speed: With the development of semiconductor industry, the core processor (CPU) develops rapidly, which makes the smart phone run faster and faster.

References:

Baidu encyclopedia? intelligent machine