FWIW, I bought an ADR6350 incredible 2 about a month ago to replace my (rooted) ADR6300 Incredible when its microphone stopped functioning... after 2 years of intense use.
Inconsistent cellular reception has always been a "given" for my last 4 phones (Nokia, LG, HTC & HTC ) over the last 10th years, probably because of my location. I live on the Gulf Coast shore of Florida with nothing but open water to the south and west of my home.
In the past I found the Smoda Widget (a dynamic toggler of the phone state from 2G to 3G) an easy way to reset my VZ connection whenever the cell signal was low, slow, or dropped.
But the Widget is not compatible with my new ADR6350 Inc2 "v2.3.3".
What DOES restore the cellular signal strength to the Inc2 (here) is: Menu -> Settings -> Wireless & networks -> Mobile networks -> Preferred network -> then marking Global Mode as the Preferred Network.
Gone NOW is the weak, low, slow, or dropped cell signal. The Inc2 reception here NOW is consistently 4 bars at G3 (Signal Strength: around 79 - 89%, Available, Connected, & Not roaming). Global Mode, YES!