The first mobile phone was developed from the field mobile phone manufactured by Bell Laboratories in the United States in 1940.

In 1958?, Soviet engineer Leonid Kupriyanovich invented the ЛК-1 mobile phone.

In 1973?, American Motorola engineer Martin Cooper invented the world's first commercial mobile phone. So far it has developed into the 4G era.

Extended information:

The current mainstream mobile operating system:

Android

Android was announced by Google on November 5, 2007 An open source mobile phone operating system based on Linux platform, which consists of operating system, middleware, user interface and application software.

The original meaning of the word Android refers to "robot". At the same time, Android's system architecture, like its operating system, adopts a layered architecture. From the architecture diagram, Android is divided into four layers. From high level to low level, they are the application layer, application framework layer, system runtime layer and Linux kernel layer.

Before Android was officially released, it initially had two internal test versions, and they were named after famous robot names.

They are: Astro Boy (AndroidBeta), Clockwork Robot (Android 1.0).

Later, due to copyright issues, Google changed its naming rules to use desserts as the code names for their system versions. Dessert nomenclature started when Android 1.5 was released.

The size of the desserts represented by each version becomes larger and larger, and then in 26 alphabetical order: cupcakes (Android 1.5), donuts (Android 1.6), waffles (Android 2.0/ 2.1), Frozen Yogurt (Android 2.2), Gingerbread (Android 2.3), Honeycomb (Android 3.0, Android 3.1, and Android 3.2), Ice Cream Sandwich (Android 4.0), Jelly Bean (Android 4.1, Android 4.2, and Android 4.3, and Lollipop (Android5.0). Users can get a better experience through ROOT.

Represents supported manufacturers: Samsung, Xiaomi, Huawei, Meizu, ZTE, Motorola, HTC, LG, Sony.

iOS

iOS is a closed-source operating system developed by Apple for the iPhone, iPod touch, and iPad, just like the Mac OS X operating system it is based on. Based on Darwin. Originally this system was called iPhone OS, until it was announced at the WWDC conference on June 7, 2010 that it was renamed iOS. The system structure of iOS is divided into four levels: the Core OS layer, The Core Services layer, the Media layer, and the Cocoa Touch layer have been developed to iOS 8.1.3.

Supported by Apple. /p>