Same here...had the Note 3 and S4 and noticed slower speeds, dropping to 3G much more often and dropped calls in the last few months. I came to the conclusion that where I live (Phoenix) is the problem. Traveled to Nevada and Cali, no issue whatsoever. Was told by Verizon Tech Support that as long as I have a signal, whether it be slow or fast, 3G or 4G, then there is no issue. What a joke!