I am experiencing the same problem with unlocked note 10 plus on Verizon. My 1 + 7 pro has no issues here at my house, but the note 10 seems to always be barely hanging on to his signal. Hopefully a software update can fix this soon.
Still having issues on Verizon going into 3G and 1X even after a recommended software reflash at a repair center. I wish someone at Samsung could just say when this software fix will happen. I am ready to return my 2nd Note 10 Plus if not. As great as the phone seems to be, it isn't much of a device if it cannot consistently connect to calls or data!
Yeah, I seldom have more than 2 bars. I did chat with Samsung on this app and he said several had mentioned issues. He thought would be good, but more that report the better