UIDAI is mandated to issue an easily verifiable 12 digit random number as Unique Identity - Aadhaar to all Residents of India. UIDAI is mandated to issue an easily verifiable 12 digit random number as Unique Identity - Aadhaar to all Residents of India. Linking your Aadhaar card with a valid mobile number ensures seamless access to services and updates. Here’s a comprehensive guide to check which mobile number is linked to your Aadhaar card. Checking your Aadhaar status lets you know whether your Aadhaar number has been generated your update has been approved or your request needs additional verification or documents. Timely Aadhar Card Status check ensures that your Aadhaar is processed without errors or unnecessary delays.