Q. How long has the cell phone been in use?

A. Except for earlier phones designed for ships and automobiles, it is thought that a shoulder phone in use around 1985 (100 type) was the first of its kind. However, it weighed almost 3 kg. The name "cell phone" was first encountered in 1987 (802 type) to describe a phone that weighed about 1 kg. At that time the phones were rented for expensive minimum fees, but they started to be sold in 1994.