About Mobile phones

Mobile Phones

A long, long time ago, in 1876,a dreamer – emigrant Alexander Graham Bell invented and patented a phone – a device that was able to replicate and transfer human voice. He was the first to be granted a United States patent for a device for phone. During the whole 20the century, engineers and inventors were improving quality and …mobility of the phone devices.

According to wikipedia, “A mobile phone is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (PSTN). Most modern mobile telephone services use a cellular network architecture, and therefore mobile telephones are often also called cellular telephones or cell phones.”

The first handheld mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a handset weighing about 4.4 lbs (2 kg).Now mobile phones are small – 4-6 oz usually. It was a revolution, but until late 90-es, mobile phones were not so popular. First generation of mobile phones (1G) used analog cellular technology, that’s why other popular name of the handheld phones became cellphones.

Today this industry has about 6 billion devices, covering any place of the planet and penetrating 100% of the global population.

Smartphones

Most popular phones today are smartphones, released for the first time in 1999, and they are last generation of cellphones, with “advanced mobile operating system that combines features of a personal computer operating system with other features useful for mobile or handheld use”.
Our smartphones today we can use as computer or normal phone, as a GPS device, as a payment device, as a book – there is almost no limit of its abilities.
Most popular smartphone brands today are: Samsung , Apple, Huawei, LG, Sony, Xiaomi.