4G is the fourth big step in the way a mobile phone talks to the internet without a wire. 2G was mostly for calls and short texts. 3G made the internet on a phone usable. 4G made it fast enough for films, maps, and video calls while you walk around. 5G is the step after.

4G is the fourth big step in the way a mobile phone talks to the internet without a wire4G 是手機不用線就能跟網路溝通的方式裡，第四個大進展. 2G was mostly for calls and short texts2G 主要是打電話和傳簡訊用的. 3G made the internet on a phone usable3G 讓手機上網變得堪用. 4G made it fast enough for films, maps, and video calls while you walk around4G 則讓網路快到可以邊走邊看影片、用地圖、打視訊電話. 5G is the step after5G 是接下來的下一步.

Phone shops and ads say 4G as if it were a thing you buy in a box. What you really get is a kind of radio service from your phone company. If you are in a basement, in the mountains, or on a crowded train, the phone may drop to something slower or show no service, even if the box said 4G.

Phone shops and ads say 4G手機店和廣告講 4G as if it were a thing you buy in a box好像它是一個裝在盒子裡買回來的東西. What you really get你真正拿到的 is a kind of radio service from your phone company其實是電信公司提供的一種無線電服務. If you are in a basement, in the mountains, or on a crowded train如果你在地下室、山區，或擁擠的火車上, the phone may drop to something slower or show no service手機可能會降到比較慢的訊號，或完全沒訊號, even if the box said 4G即使盒子上寫的是 4G.

People also print 4G LTE. LTE is one common way of building 4G. In daily Taiwan talk you can just say 4G. The word is a little technical, but almost everyone with a phone uses it.

People also print 4G LTE有些地方也會印 4G LTE. LTE is one common way of building 4GLTE 是實現 4G 常見的一種技術. In daily Taiwan talk台灣日常講話 you can just say 4G直接說 4G 就可以了. The word is a little technical這個字有點技術性, but almost everyone with a phone uses it但幾乎每個用手機的人都會用.