I have a note 10 plus non 5g version. When I make a phone call all is good but nearly everytime at random intervals I will hear a beep, my phone will give a no sim card error and the call will drop. My phone will then immediately regain service and I can call the person back with no issue until the call drops again (sometimes within 1 minute or never).I have reset caches and even factory reset my phone and the problem persists. After I factory reset my phone, I just backed it up with all of my old info including settings and apps so I wonder if a setting or app is causing the issue. My carrier is Verizon and the myverizon app says I have a 5g plan even though my phone isn't 5g, so idk if that could also be related. I have also put in a brand new sim and that didn't fix it. I'm hoping to find a solution because I don't want to drop the money on a new phone right now.
I can understand how frustrating this issue can be. I can see that you have done a lot of troubleshooting steps already. To resolve this issue you will have to reach out to your service provider.
