Poor service 4g in Las Vegas, Kingman AZ and Maui

[Dstrbd]

I always said Verizon had the best service, until about a year ago. Since then phone calls have been dropping in Las Vegas. My 2nd home outside of Kingman 4G internet is almost zero. Just went on vacation in Maui and the internet is worthless. Friends with T-mobile have full service in all these places for less than half of what I pay. Please Verizon, I give you one chance to keep me from switching. 
very unsatisfied at this point.