Want to activate your UAN using only your phone? This 2026 step-by-step guide shows you exactly where to tap inside the UMANG app to complete UAN activation without confusion. Learn the precise 5-step process, Aadhaar OTP requirements, common activation errors, and what to do if your UAN fails to activate. Whether you're using UMANG for the first time or facing OTP issues, this guide helps you activate your UAN quickly and correctly through the official EPFO system.