I tried calling you on your mobile¹.

　　我试着打过你的手机。

　　A         I tried calling you on your mobile.

　　A    我试着打过你的手机。

　　B         What time was that?

　　B    什么时候?

　　A         It was about an hour ago. But I couldn’t get you.

　　A         大约1小时以前。但是不能和你联系上。

　　B         I was on the subway. I don’t think you can get a signal underground.

　　B    我在地铁上。我想地铁里没有信号。

　　There are various situations and reasons for not receiving a phone call.

　　有很多情形和原因不能接到电话。