I have another AT&T wireless service runing in my old s8, that I take with me always... This service is working just fine.. Its definelty not a service issue. It should be a device issue.
@userNg05tgO0du Depends 2 bars of LTE or 3G? but 2 bars on any connection is good. Again, I suggest you to call customer service for inquiries. I have Note10+ unlocked on AT&T as well no VoLTE but i can make calls without dropping but calls are slow to make since I don't have VoLTE like I said 3G call is not good on AT&T. Although, AT&T says VoLTE will enable for unlocked devices by end of this year but I can't confirmed.
I had the same issue using the unlocked note 10+ on t-mobile.
I ended up using Odin to load the actual T-mobile firmware and I noticed a significant improvement. Obviously this is not condoned by Samsung but it is what it is. The signal naturally fluctuates where I am, but overall doing that helped.
Purchased the Note 10 Plus 512 Sprint and having the same signal issues. Very similar to the nightmare my wife had with the S10 Plus. I have 14 days I will probably return the phone and get an IPhone XS Max like we did for her. Sad, but Note 9 had much better signals in all the exact same areas.... I suspect this is the same antenna issues associated with the S10 Plus.
Yes. I am a software engineer by trade and closely tracked and debugged this same issue with my wife's S10 Plus. On a trip, on major highways today, I experienced 2 dropped calls and data was in and out. Same trip 2 weeks ago using Note 9 I experienced no data issues or call drops. I have 14 days to decide whether to keep it or return it I will watch this very closely. I have had every note since the Note 2. Hoping it is not another S10 saga...
Yeah I returned mine as well. Ridiculous for a $1100+ to have an issue as widespread as this. So much so they knowingly used the same parts that were so bad on the S10+ and Note 10+