Is anyone else experiencing connection issues on there new phone, mine will all of sudden not allow me to make calls out and data connection issues. I have to restart my phone to be able to use the mobile network and make and receive calls. I not sure if its a Verizon thing or a Samsung issue.
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I been through the same thing with tmobile when I had gotten my s20 ultra last March. I had horrible signal, couldn't connect, missed calls and messages and had been on the phone with support over and over for months until I just switched my phone to LTE. They kept saying it was a Samsung issue, I called Samsung and they said it was a carrier issue. So I just gave up on 5G. Then in summer Tmobile announced that their old SIM cards were causing issues with the 5G phones on their network and to get the new SIM card to access their 5G network. Like I said, when I got the new SIM card I had no more connection issues. Like I said, it wasn't a Samsung issue, it was a carrier issue. The phone was trying to connect to a 5G signal and the SIM card couldn't handle that and was causing the signal to get "stuck"...no receiving 5G or LTE signal unless you shut off mobile data by going into airplane mode or restarting your phone. Doing that would free up the SIM card but then you would keep having same issue once the phone finds even a faint 5G signal somewhere and the SIM card would get stuck again.
US cellular is a little behind the major carriers as far as 5G adoptation and so they probably don't even know what's causing the issue yet. Eventually they will upgrade their SIM card as well, but since they are a CDMA network, you should change your network to LTE/CDMA and restart your phone. I understand your frustration, I went through it for about a month before I switched my s20 Ultra to LTE before tmobile released their new sim cards.
To note: switching to the LTE/CDMA, does not prohibit 5g. I'm traveling now and have it off global, and I'm getting 5g signal. Also it switched to 4g seamlessly. But occasionally I get no signal or errors. I think the hand off from wifi to cellular causes issues also.
This phone is horrible!!!
but,I fixed it, I have tmo and I turned off the 5G. my phone works fine now with 4g lte.