Near the top of this page you said your husband had a work phone that had to stay connected.
Do you have a VOIP unit between your modem and router or modem and computer if you have eliminated the router? If not are you talking about using a Smart phone ( your husband's work phone) to connect to the web via your router?
You said you and your husband both have I phones.
The I0S8 update released on 17 September is 1.1 GIG. Did either of you install the update using your internet connection?