When I call on my phone or have a call coming in, I can’t use it on wifi. If I am on wifi then I break in and out. I have to turn off my wifi and use my data which means I am using up my data when I shouldn’t have to. I have an iphone 6s plus. My husband has a Samsung and with a different cell service and it doesn’t happen to him, is it my phone or my cell service? I have tried sitting right beside my router, sitting outside, also when using wifi my video chats are pixelated to the other person, always saying a connection problem yet I see them perfect.