mobiilipuhelimista
Mobiilipuhelin, commonly 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 transmission technology used for mobile phones is called a cellular network. Early mobile phones were bulky and expensive, primarily used for business purposes. However, technological advancements have led to smaller, more affordable, and feature-rich devices.
The first commercially available mobile phone was the Motorola DynaTAC 4X000x in 1983. Since then, mobile phones
Mobile phone technology continues to advance rapidly. Newer generations of mobile networks, such as 4G and