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The development of smart phones
Mobile phone is an extremely important communication tool in modern society, which was once praised as one of the greatest inventions in the 20th century.

The history of mobile phones can be traced back to 1958. 1958, Soviet engineer Leonid Kupriyan Norwich invented лк- 1 mobile phone, which is the earliest mobile phone.

The predecessor of mobile phone is landline phone. After the British physicist Maxwell put forward the electromagnetic wave theory, it was finally verified decades later. The fixed telephone was invented by American scientist Bell (1876). Since then, the convenience of telephone has spread all over the world.

Early mobile phones were large, about the size of bricks, so they were also called "brick mobile phones" and "kettle mobile phones". The famous representatives of early mobile phones were Nokia and Motorola. Later, more brands appeared and the two old brands gradually faded out of the market.

In 2009, there was a breakthrough in touch screen technology, which was originally owned by the state and began to widely enter the private sector. In 20 12, nearly 50% of mobile phones in the world used touch screen technology. After 20 15, 80% of mobile phones and smart products in the world have achieved touch intelligence.

Famous representatives of mobile phones today:

Foreign brands: iphone, Samsung Electronics, Blackberry.

China brands: Huawei, Meizu, Xiaomi, oppo, vivo, TCL, Lenovo and BBK.