Ussd does not work

I’m sorry to hear that your Samsung Galaxy Note 20 Ultra 5G is having trouble with USSD codes. This seems to be a common problem for some users of this device. Here are some possible solutions you can try:

Restart your phone. This has worked for some users¹.
Turn off Wi-Fi Calling if you have this setting switched on. Go to Phone > More > Settings > Wi-Fi Calling¹.
Clear your phone’s cache. You can do this by booting up your phone in recovery mode¹.
Try a different SIM card and/or network on your phone. This may help determine whether you have a phone or network issue on your hands¹.
Switch from 5G to 4G. Go to Settings > Connections > Mobile Networks > Network Mode > 4G/3G/2G (Auto Connect)².
Reset the Access Point Names for your network. Go to Settings > Connections > Mobile Networks > Access Point Names > More > Reset to Default².
Check if you are using a valid USSD code for your network and region. Some codes may not work on certain devices or locations³.

If none of these actions work for you, you should contact Samsung or Verizon and ask for technical support or a repair. You can also use the Samsung Galaxy Note20 Ultra 5G Troubleshooting Assistant to identify and resolve other problems with your device.

I hope this helps you fix your USSD code problem. Have a nice day! 😊