Our 1.5 year old Droid Maxx is occasionally breaking up while we use it at home. Just started within the last week or two. System is up to date. We are in sight of a Verizon tower, less than two miles away, but the 4g service occasionally drops to 3g with 1 or 2 bars. Our month-old Maxx 2 shows fluctuations in 3g4g and signal strength, but we haven't experienced our conversations breaking up on it. Also, it seems to revert to 4g and 3-4 bars much faster than the older phone. What gives? BTW, wifi and BT are off. Thanks for any and all suggestions.