This is just happening so frequently, but it doesn't affect anything other than it being an annoyance.
At&t in store support: just wait for the update
At&t social media team: reset the wifi settings
Samsung support: let's clear the cache partition. Note that when I try the button combination to get into setup, Bixby starts. Maybe I need to take my phone out of the case to get better access to the buttons.
Went to Best Buy and went to the phone area, and was referred to Geek Squad. Geek Squad agent: let's factory reset the phone.
I guess I have to just live with this frequent 'no internet connection' message or just be temporarily inconvenienced when I have to figure out passwords for wifi and reconnect bluetooth devices again.
This wasn't an issue with the S8, and essentially the same apps running on the S8 are on three S10+.
What if my phone keeps hitting an inoperable tower? I mean, At&t support suggested that the Samsung experience at Best Buy would be able to take a look at the phone and maybe do diagnostics on it. I don't feel like I even talked to someone at Best Buy representing Samsung, it was a Best Buy employee working at the Geek Squad with knowledge of phones.