I have an iphone 6, my mother has an iphone 4s. When she calls me and I am at home (my phone is connected to my home network), she keeps hearing the ringing sound as if I didn't answer, we can still talk however. I do have a macbook air 2011 as well. Previously I activated continuity with the continuity activation tool, but have since disabled it. Has anyone heard of this issue? Or have any idea of how to stop it?