Phone Etiquette

I took a call this week from someone inquiring about a house. She was driving by and said she had called 12 agents during the day and I was the only one to call her back....
Don't take it personally but I don't even get return phone calls from agents, especially when the voice message is:
"Your call is very important to me and I will get back to you just as soon as I can, however I only check my messages twice a day because I am very busy! Please repeat your number twice and have a nice day!" It's amazing to me how many agents have the same message.
I mean with all the technology, text , email and chat - it's pretty easy to answer all inquiries via your smart phone. Isn't it? Of course, if your with a client we certainly understand you want no interruption but an hour or two to respond is not too much to ask rather than no return call at all, don't you think?
[75093,Plano,TX,]