Mobiilipuhelin

Mobiilipuhelin, also known as a mobile phone or cell 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 a cellular network, which is composed of many radio cells each having a fixed location. As the user moves through the cells, the phone connects to the nearest cell tower. This network infrastructure allows for ubiquitous communication.

The first mobile phones were introduced in the mid-20th century, but they were large, expensive, and primarily used by businesses. The development of cellular technology in the late 1970s and 1980s led to smaller and more affordable devices, making them accessible to the general public. Early mobile phones were mainly used for voice calls, but over time, their functionality expanded significantly.

Modern mobiilipuhelin devices, often referred to as smartphones, are powerful computing devices with advanced features. They typically include touchscreens, internet connectivity, cameras, and the ability to run a wide range of applications. These applications allow users to browse the web, send emails, use social media, play games, navigate with GPS, and much more. The evolution of mobiilipuhelin technology has profoundly impacted communication, entertainment, and daily life worldwide.