Hi Alex,
Thank you for writing back. I've spent most of the last few days trying to fix this problem without success. I talked to my ISP (who tried to help, but couldn't) and two different tech support folks at d-link, who were not very helpful. I realized the only other option might be with my phone provider, so I talked to tech support online and they gave me a great idea which did isolate my problem. That's the good news. Let me explain.
The tech thought it might have to do with the fact that my phone is so old and using 3G. These days, surfing the Net doesn't always work so well for my iPhone 4G (which can only utilize 3G and might not even load a webpage at times) but I'm one of those people who prefers to use something until it breaks, rather than upgrade to be fashionable. I planned on using my phone until it literally died or broke...anyhow, the tech I chatted with suggested using a temporary "loaner" phone capable of using LTE at one of my phone providers locations to test it out.
Sure enough, I went today to try using the my dlink app on a phone that was LTE capable and the microphone worked within seconds.
So there you go folks. If you are a dinosaur like me and have this issue, find out what connection your phone uses and consider trying out the app on a phone that can use LTE ton confirm what I did. It seems to be the issue for me.
And now, to look into getting a new phone...lol
Good luck and hope this helps!
Mr. Gisa