but you may have it turned off to conserve data.

但你可以將其關閉以保存數據。

Here's how to check and enable it if it is turned off.

下面是如何檢查和啟用它，如果它被關閉了。

Unlock your iPhone and tap on the settings icon

解鎖你的iPhone並點擊設置圖標

to open settings.

來打開設置。

In settings, scroll down until you find "Messages"

在設置中，向下滾動直到你找到 "資訊"。

and tap on it.

並點擊它。

In the middle of your screen,

在你的螢幕中間。

you'll see an on-off slider for iMessage.

你會看到一個iMessage的開關滑塊。

If the slider is to the right and green, iMessage is on.

如果滑塊向右，並且是綠色的，說明iMessage已經開啟。

If not, tapping it will turn it green,

如果沒有，點一下它就會變成綠色。

and iMessage will then be enabled.

然後，iMessage將被啟用。

You will now be able to use iMessage

你現在將能夠使用iMessage了

to send and receive messages on your iPhone.

來在你的iPhone上發送和接收資訊。