My Note 20 Ultra doesn't allow to change network mode

[Sujalnirala]

The network mode buttons are greyed out.

(information: It is Verizon's Note 20 Ultra, I am currently using it in India, can that be the reason?)

[cs_member10]

Dear Samsung Member,

Greetings from Samsung Customer Support!

Since your product was purchased from abroad, we would request you to please get in touch with the customer support of the respective country.

To reach country-specific Samsung support teams click on the below link:
https://www.samsung.com/country/

Warm Regards,
Samsung Customer Support