I Have Galaxy Note 20 Ultra SM-N9860 And Iam On The Latest Firmware. 5G Is Not Working. I Received this text message from my carrier When i inserted my sim ( Currently you are using 5G device which is not certified to access Ooredoo 5G Network, therefore you will not be able to access Ooredoo 5G network )
Don't worry, it will work after you receive the Android 11 (one ui 3) firmware update. I had the same problem with my G9880 (S20 ultra) and as soon as I updated the problem was solved. You will receive the update in January!