Service Mode Menu Reset Help

[Noxus]

Heya all Samsung folks. I have a Galaxy S25 USA unlocked (U1) XAA CSC which I am using in Asia but not getting VolTE and Carrier Aggregation. So I tried to figure out that in Service Mode Menu via *#73#. I messed up many things, now I cannot get 3G on my phone. 4G and 2G works but 3G not working anymore. Before that it worked. Now, please advise me all possible solutions to revert them back to factory. Normal factory resets did not make any difference.

[AlienSec]

Rule number 1.
Never buy global samsung devices if you're in India just go for Indian variant.

[Noxus]

Agreed. Now if you could suggest how to revert everything.

[cs_member8]

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.

You can click the link provided below to reach your country-specific Samsung support team:
https://www.samsung.com/in/function/ipredirection/ipredirectionLocalList/

Warm Regards,
Samsung Customer Support"