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Fix NSP Error 904 & Face RD Issues: Complete Guide

Published 8 September 2026
Last updated Updated 11 hours ago
7 min read
students
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Struggling with NSP Error 904 or Face RD app? Learn how to unlock Aadhaar biometrics and complete your NSP OTR registration for 2026-27 scholarships.

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Mastering the NSP OTR: Resolving Biometric and Face RD Hurdles

For students across India, the National Scholarship Portal (NSP) has transitioned to a more secure One-Time Registration (OTR) system. While this enhances security, many applicants are currently facing technical roadblocks, specifically NSP Error 904 and failures within the Aadhaar Face RD application. At YojanaRadar, we understand that these technical glitches can be the only thing standing between you and your financial aid. This guide provides actionable solutions to ensure your biometric authentication is seamless.

Understanding NSP Error 904: Why It Happens

Error 904 is a frequent headache for students during the OTR generation process. Typically, this error indicates a communication failure between the NSP servers and the UIDAI (Aadhaar) backend. However, it can also be triggered by:

  • Locked Biometrics: Your Aadhaar profile has biometric locking enabled for security, preventing the NSP app from accessing your data.
  • Outdated Aadhaar Face RD App: Using an older version of the face recognition service.
  • Unstable Internet: Micro-fluctuations in data during the encryption process.

How to Fix Aadhaar Face RD Authentication Failures

The Aadhaar Face RD app (developed by UIDAI) is a background service, not a standalone app you can open. To ensure it works correctly for NSP:

  1. Check Permissions: Go to your phone's Settings > Apps > Aadhaar Face RD. Ensure that 'Camera' permissions are set to 'Allow only while using the app'.
  2. Clear Cache: If the app freezes during the face scan, clear the cache and data of the Face RD app and the NSP mobile app.
  3. Lighting Conditions: Ensure you are in a well-lit room with a plain background. Avoid wearing hats, masks, or heavy glasses during the scan.
  4. Device Compatibility: Ensure your smartphone has at least 4GB of RAM and a functional front camera with autofocus.

Step-by-Step: Unlocking Aadhaar Biometrics via mAadhaar

If you receive a message stating your biometrics are locked, you must unlock them before the NSP app can verify your identity. Here is how to do it using the mAadhaar app:

  • Download and Login: Open the mAadhaar app and log in using your registered mobile number and OTP.
  • Locate Biometric Settings: On the dashboard, find the 'Biometric Lock' status.
  • Unlock: If it shows a red icon (Locked), click on it. You will be prompted to enter your Aadhaar number and a CAPTCHA.
  • Temporary Unlock: You can choose to 'Unlock Biometrics' temporarily for 10 minutes, which is usually enough time to complete your NSP registration.
  • Disable Lock: If you prefer, you can disable the lock entirely, though we recommend re-locking it after your application is submitted for security.

Advanced Troubleshooting for Persistent Error 904

If you have unlocked your biometrics and the NSP Error 904 persists, try these professional tips:

1. The Re-installation Method

Uninstall both the NSP OTR app and the Aadhaar Face RD app. Restart your phone. Install the Face RD app first, followed by the NSP app. This refreshes the API handshake between the two platforms.

2. Check Aadhaar-Mobile Linkage

Ensure that the mobile number you are using for the OTR is the same one linked to your Aadhaar. If there is a mismatch, the encrypted packets sent during face authentication may be rejected by the UIDAI server.

3. Use a Different Device

Sometimes, specific OEM software (like certain versions of MIUI or ColorOS) interferes with the Face RD background process. Try using a clean Android device (like a Pixel or a device running stock Android) if possible.

Final Checklist Before Submitting

Before you attempt your next OTR generation, ensure the following:

  • Your Aadhaar is active and not suspended.
  • Your date of birth and name on the Aadhaar match your school certificates exactly.
  • You have the latest version of the NSP app from the Google Play Store.
  • Your phone battery is above 20% (some devices throttle the camera in low power mode).

By following these steps, you can bypass the common NSP Error 904 and successfully complete your biometric verification. Remember, the OTR is a one-time process; once completed, your future scholarship renewals will be significantly easier. Stay tuned to YojanaRadar for more updates on government schemes and technical guides.

Source: https://scholarships.gov.in

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