What are code changes for Indian frequency..?

Hi Everyone,
I’m very beginner to LORA and meshtastic, I got heltec-v2.1 lora board and somehow I did flashing but can’t able to understand how to change my region frequency(865-867MHz) and corresponding power and channels because as per website default region is USA and also mentioned how to change but I can’t able to understand. I have flashed using firmware file directly instead of VScode way(means compile and upload). Do I really need to change this…? what region I’ve to select in android app…? please help me in setting these things
Thanks in advance

You don’t see India in the list because it’s not implemented. Perhaps you might be able to contribute the legal limits for radio in India, or even a pull request to fix it, though!