Hello & Welcome to Just Answer,
Sorry I didn't see your question earlier and to hear of any issue you are having with your phones.
To help you with this issue, may I ask:
1) Can I safely assume that the D-Link is the wireless router for the network you are trying to connect to AND other devices can connect to it successfully?
2) Do you have the Smartphone Connect Setup Guide for this system?
If you do not have that guide, I have a link to the Electronic (PDF) version of it below for you.
I also have a couple of links to videos that show how to connect - in two different methods (using SSID & Password ***** using WPS).
Please take a look at either of those videos (or both) and then try one of them to see if that is successful.
Thanks, ***** *****