The 1st 2 sound like false awakenings. It's very common if you really want to do something, or feel you need to do something, and you're right on the verge of being awake, to dream of doing it. I suppose it's your mind's way of rehearsing for what you want so badly to accomplish.

The last one seems a bit different. It sounds like you actually did a bit of sleepwalking, answering your phone before you were awake, or maybe before you were FULLY awake. There's a sort of in-between state before you wake all the way where dream blends with waking existence for a while.