注目の話題: こんな考え最低ですか？婚約中; ベビーカーの周りに家族が不在; 友達ってなんだろう

A diary of a heretic in English

No.68　11/03/28 08:57
蚤野心蔵 ( 50代 ♂ Oe38xe ) あ+あ-

【A cellphone of the fourth generation】Ⅲ

Changing the system into digital　also contains an element of　using cipher, so it becomes hard to eavasdrop.📱

There is a big difference between the cellphones in those days and modern ones. The former ones were rental system. The users didn't used to buy the cellphones themselves.📱

Lots of people learned to buy the cellphones since 1994, and after that they have spread rapidly and the　users have received a plenty service with the cellphones.📱

Then development of cellphone which we could around world　has made progressed,but Western countries weren't willing to do it, so it remains stagnant,for Western countries seems to have thought that investment in plant and equipment for base stations of the cellphones was vast and the investment didn't pay.🇺�🇬�

To be continued. By😁