Many wireless devices get held up or rejected at customs because they lack proper approvals. The “Wireless Products Approval” section of Sunren.net is a simplified but thorough walkthrough of what you need to legally bring in or sell wireless hardware in India. It explains regulatory bodies (WPC, BIS, etc.), the kind of test reports needed, how to select accredited labs, what frequenc... https://www.sunren.net/wireless-approval.html