I was about to go to bed, when the phone rang.
I was about to go to bed when the phone rang.
When dozing off I had a phone call, and couldn't get back to sleep after that.
I was just about to leave the house when the telephone rang.
As soon as I got home, the telephone rang.
I had barely got in the house when the phone rang.
I was about to go out, when the telephone rang.
I noticed that I got a message on my cell phone in the middle of returning home.
I was in the bath when the phone rang.