Just have my AW4 LTE for over 24 hours, and tested it in the few places I used to get marginal reception with my AW3 LTE. My 4 seems to have as many bars as my phone, or one better. Whereas my 3 would be the same or one bar less.
Not sure reception is better on my 4 vs. the 3 but the sound is louder and with what seems greater clarity. In some way, that may make reception appear to be better.
I now get cell signal in my building’s elevator and other known spots where I’d either not get a signal or it’d be inconsistent - it is for sure improved in my experience.