As a number of people have rightly said. If you have a mobile phone you check it, and if there are problems with something that has been arranged, as a matter of courtesy, you let the other party know. If you are not going to check your phone, then you would divert it elsewhere or even leave a message that lets your prospective clients know the appropriate means to contact, if not you, then someone else who can be of assistance.
Or get a desk job !
After all, we are talking about a considerable amount of commissions at stake here. It's not like a cheap commission you are likely to miss out on if you screw up.
Yet another reason for him to get a desk job, he doesn't understand what he's dealing with
As an aside, this agency has a couple of other properties that may appeal to me, but I'm not even going to bother to look at them, especially when there are plenty of other agents who really want the work.
Another local agent showed me a property which I didn't mind and I asked if I could get another family member through the next day. It was his day off too. His reaction was to let me know that it was his day off, & he couldn't do it at the time suggested by me as he had made personal arrangements in the afternoon that he couldn't change, but he was willing to do it in the morning. I said to him that I didn't need to do it on his day off, we can do it another time. He said it was no trouble and he really didn't mind.
Out of the two, who do you think I would rather purchase through, if the right property becomes available?