My wife and I both have iPhone 6S phones and experience terrible phone service/reception at our home in La Grange, IL (60525) and outside of Buchanan, MI (49107). I previously had much better service thru AT&T but changed to a new phone and moved to Verizon. Phone calls from inside either house commonly experience drop outs and cellular internet connections are very intermittent at best. Our house in MI does not have internet service and we rely on our phones to stay connected, but not that we have lost t eh AT&T service we have almost no service at all.
What can we do to rectify this poor service?