Smart phones, like personal computers, have independent operating systems and independent operating space. Users can install programs provided by third-party service providers such as software, games and navigation, and can realize wireless network access to mobile phones through mobile communication networks.


Smart phones have been used all over the world, but not everyone knows and uses them. Because smart phones have three characteristics: excellent operating system, free installation of all kinds of software (only Android system) and full touch-screen sense of full screen operation, they have completely ended the keyboard phones of previous years.


Smart phones have five characteristics:


1. It has the ability of wireless access to the Internet: that is, it needs to support GPRS under GSM network or CDMA1X or 3G (WCDMA, CDMA-2000, TD-CDMA) network of CDMA network, or even 4G (HSPA +, fdd-lte, tdd-lte).


2. It has the function 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, so that the functions of smart phones can be infinitely expanded.


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


5. Powerful functions: strong expansion performance and many third-party software support.


6. Fast running speed: with the development of semiconductor industry, the core processor (CPU) is developing rapidly, which makes smart phones run faster and faster.