Yeah pretty much. Cell service is a radio signal, and like radios signal can be impacted by topography, landscaping, homes, additions to homes etc. One time I visited my mother and I had no service or very little in her home. Now it's a lot better. One place I got great service, now it's poor. Cell phones were never meant to replace landlines, but people think it is, and get upset when the service is poor. Get over it. If your business is to be on the horn get a landline.