Which Radio works best on Airtel - India?

I am on Chroma 24 Oct build, having MDM9625_104662.22.05.27R Radio, I am getting frequent Signal drops and LTE is patchy at the best specially in Delhi and NCR region. Has anyone else experienced this and have you been able to solve this and did you flash a different Radio? I am on Airtel.

All the help would be appreciated guys.

Thanks.