Greetings T-mobile community!
I have bought a used (T-mobile) Samsung Galaxy S20 Ultra 5G from a friend of mine and when I tried to change Network mode (from automatic to 4G or 5G only) I couldn’t as the option to do so was not available (was blured/grayed).
side notes:
1- I’m using a sim card from different operator.
2- By going to Settings- Connection- Mobile Networks, you should be able to see the option to change Network mode.
I appreciate your kind support with this matter.
Regards,