I had a Note 4 for a week. Nearly every call in my home area dropped and only when I came into the city could I keep a call. I had a booster but it only works in my house and not in the mile area around my house and it isn't that remote here, I can see a subdivision that is about 2.5 miles away as the crow flies. So now I continue to use my old Note 2 which never has a prob with dropped calls. When I was trying the Note 4, they changed my sim card twice to no avail. My husband tried a note 3 last yr and had the same prob w/dropped calls and he switched to the iphone which has worked fine for him. I continue to use my note 2. I want the new phone. Is the Note 4 receiver not as robust or is the manufacture of the electronics so variable that one machine will work better than another of the same model?