Same customs conditions apply for every forwarders in india. Get them by hand with any person and declare the mobile phone value and pay import duty at airport. Or ship them to Nepal address. (no import duty on cellular phones in Nepal) and get them to India. I do not want to discuss here how to get them india.
import tax guide to Nepal
https://onedrive.live.com/redir?resid=132C14DBC2088CE5!7915&authkey=!APFfqj5zIh1ex0g&ithint=file%2cpdf