I agree that the schedulers need to leave a message. They've already spent the time calling you, so it only makes sense to spend a few seconds longer to leave a message, which would generate a callback, and hence, an assignment. Good for the scheduler, good for the shopper. If I knew it was a scheduler, I would call back immediately. I suspect they don't want return calls; they can control their phone traffic by only doing outbound calls. But for folks like me and those of you who replied in this thread, we will never pick up if we don't know it's you, so you're wasting your valuable time. So if you're a scheduler, just let us know that!