I'll phone up today and reserve a room.

我今天将打电话预定一个房间。

If you can't remember what it is phone up and ask.

如果你不记得电话叫人就得问别人。

Dial when you hear dialing sound after you pick the phone up.

将手柄从话机上向上提起后摘机，听到拨号音后即拨号。

To switch to the horizon view, you can tilt the phone up or down.

要切换到地平线视图中，您可以电话倾斜向上或向下。

The operator told me to hang the phone up and call the number again.

总机叫我挂掉电话后再回放一次相同的号码。