I have an AT&T branded Note 10+, I live in Las Vegas and I'm struggling with dropped calls a lot. In places my note 8 never struggled. I'm also having issue with connecting to data when I'm out and about town. Phone has been restarted along with factory reset to see if any improvements. None so far. I've checked multiple times to see if there's an update.
I heard that if a component is not attached tight enough in the Note10, there can be weak signal issues. This was from a teardown I saw somewhere.
Samsung doesn't test for proper signal connection according to what I see in the diagnostics TESTMODE.
Problems are back with mine as well. I thought switching carriers was the solution but all issues are back with cellular reception. The note 8 didn't have that great of cell service but the Note 10+ makes the note 8 look superior in reception.
I've had my phone T-Mobile Note 10 plus for 3 days. Switched SIM card from a Galaxy 8, no signal problems at all. WARNING!! DId have an issue with S-Pen. Purchased wallet case w/magnet strip for closing. Completely disrupts S-pen blue tooth. Also phone does not operate properly. Took out of wallet, perfect. Spread the word, this was also on the samsung troubleshooting help page. Awesome phone!!.
I have the exact same problem with an unlocked Note 10+ on ATT. My previous phone the galaxy s9+ had great signal at my house and this new note 10+ gets zero or 1 bar at my house. My house is less than a mile from a LTE cell tower too.
Same, also have issues on T-Mobile. Pixel 3 gives me solid signal and Note 10 goes out of service, can't even make a call. I think it's not connecting to the same band that Pixel does