Here's something peculiar, my 4g dBm is the same on my note 2 and g3, -110. The note can hold 4g but g3 drops it
I have noticed the same thing with the G3. It loses LTE with a weak signal faster than my other devices and is slow to return to LTE. I find airplane mode solves this. It's takes a few seconds to pull the drop down menu, select airplane mode, wait, select it again to turn off, then LTE is back.
I have done extensive testing on different devices. There's 1 spot in my house that I lose LTE on all phones eventually. Here's what I've found:
G2 - Loses LTE after about 5 minutes. Returns shortly after moving from the spot, and can return while sitting in the spot.
G3 - Loses LTE after about 5 minutes. Sometimes returns back to LTE, but can remain stuck on 3G.
iPhone 6 - Loses LTE after about 10 minutes. PIcks it back up after a few minutes. Bounces back and forth while sitting in the same spot almost like it is trying to stay on LTE.
Droid Turbo - Loses LTE after about 10 minutes. Returns shortly after moving from the spot, and can return while sitting in the spot.
All devices put LTE in and around -115 dBm to -118dBm. None of the 4 devices had a bettter signal than the other.
So for me, I'd rather have the G3 and all of it's functions and have to put it into airplane mode, then take it out as opposed to any of the other devices. And that's what you need to look at. What's your point of no return. What device hiccup can you live with, because
all devices have hicupps.