mobiilipuhelinta
mobiilipuhelinta, or mobile phone, is a portable telephone device that operates using radio frequencies to connect to cellular networks. The first commercially available mobile phones appeared in the 1970s, pioneered by companies such as Motorola with the DynaTAC model. Early devices were bulky and had limited battery life, but they established the basic concept of a wireless communication device that could communicate over long distances without wired connections.
In the 1990s, the introduction of 2G digital networks greatly enhanced mobile phone performance, enabling high‑speed
Mobile phones have become ubiquitous worldwide, influencing social interaction, commerce, and information dissemination. They serve as