I've just been disconnected from a number.

我的电话断掉了。

I've just been disconnected from a number.

我的电话断掉了。

It must be something wrong with the line.

一定是线路出了问题。

I can't get a proper dialing tone.

拨号音不正常。

I can't get a proper dialing tone.

拨号音不正常。

Try it again.

再拨一遍看看。