Aadhaar Mobile Update 2026: Fix OTP Fails in Exam Reg — Explained

In recent years, Aadhaar has become an essential identity document for millions of Indian citizens, especially when it comes to government services and exam registrations. The unique identification system is linked with biometric and demographic data, including the mobile number registered with Aadhaar. However, as we move into 2026, many candidates face a recurring issue during exam registrations: OTP (One-Time Password) failures due to outdated or incorrect mobile numbers linked with their Aadhaar. This problem can cause significant delays and even disqualifications from crucial government job exams.

This article delves deep into why OTP failures occur during exam registrations linked to Aadhaar mobile numbers, the importance of updating your mobile number, and practical steps to fix this issue. Whether you are a first-time applicant or a frequent exam taker, understanding this process will help you avoid unnecessary hurdles and ensure a smooth registration experience.

Understanding Aadhaar Mobile Number and OTP Verification

The Aadhaar system issued by the Unique Identification Authority of India (UIDAI) links your biometric and demographic data to a 12-digit unique identification number. One of the critical data points in this system is your mobile number. This number is used to receive OTPs, which are mandatory for authenticating your identity during various online processes, including exam registrations.

When candidates register for government exams like SSC, UPSC, Railway Recruitment Board, or State PSC exams, the portals often require Aadhaar-based authentication. The system sends an OTP to the mobile number registered with the Aadhaar database to verify the candidate’s identity. If the OTP does not arrive or fails, the registration process cannot be completed.

Why Does OTP Fail During Exam Registrations?

OTP failure is a common complaint among candidates during exam registrations. Several factors contribute to this problem:

• Outdated Mobile Number in Aadhaar Database: Many people change their mobile numbers over time but do not update them in the Aadhaar database. If the mobile number linked to Aadhaar is no longer active or accessible, OTPs cannot be received.
• Mobile Number Not Linked to Aadhaar: Some individuals may have never linked their mobile number with Aadhaar, making OTP-based verification impossible.
• Network Issues: OTP delivery depends on telecom networks. Poor network coverage or temporary outages can delay or prevent OTP receipt.
• Technical Glitches on Exam Portals: Sometimes, the problem lies with the exam registration portal or UIDAI servers, causing OTP generation or delivery failures.
• SIM Card Issues or Mobile Phone Problems: Damaged SIM cards, blocked numbers, or mobile phone software issues can also prevent OTP reception.

Consequences of OTP Failure in Exam Registrations

OTP failure during exam registrations is more than just an inconvenience. It can lead to serious consequences for candidates:

• Incomplete Registration: Without OTP verification, the registration process cannot be completed, barring candidates from appearing for exams.
• Missed Deadlines: OTP issues may cause delays, and candidates might miss the registration deadline.
• Disqualification: Some exams strictly require Aadhaar authentication. Failure to verify your identity may lead to disqualification.
• Loss of Application Fees: In some cases, candidates may lose the fees paid if registrations are incomplete or rejected.

How to Check If Your Mobile Number Is Linked to Aadhaar

Before attempting to update your mobile number, it is crucial to verify whether your current mobile number is linked to your Aadhaar. Here are the steps:

1. Visit the official UIDAI website: https://uidai.gov.in.
2. Navigate to the “Verify Email/Mobile Number” section under the Aadhaar Services tab.
3. Enter your Aadhaar number and the mobile number you want to verify.
4. Complete the CAPTCHA and click on “Send OTP.”
5. If the OTP is sent successfully, your mobile number is linked with Aadhaar. If not, it means the number is not linked or incorrect.

Alternatively, you can also check your Aadhaar details by visiting an Aadhaar Enrolment Centre or using the mAadhaar app.

How to Update Your Mobile Number in Aadhaar for 2026

Updating your mobile number in Aadhaar is essential to avoid OTP failures during exam registrations. UIDAI provides two primary ways to update your mobile number:

1. Update Mobile Number Online (If You Know Your Existing Mobile Number)

If your current mobile number is linked to Aadhaar and you want to update it, you can do it online using the UIDAI portal:

1. Visit the UIDAI Self Service Update Portal: https://ssup.uidai.gov.in/.
2. Enter your Aadhaar number and the CAPTCHA code, then click on “Send OTP.”
3. Enter the OTP received on your existing mobile number.
4. Select the field to update (Mobile Number), enter the new mobile number, and upload any required documents if applicable.
5. Submit the request and note the Update Request Number (URN) for tracking.

Note: This method requires access to your existing mobile number to receive the OTP.

2. Update Mobile Number Offline (If You Do Not Have Access to Existing Mobile Number)

If you have lost access to your old mobile number or it is inactive, you must visit an Aadhaar Enrolment Centre to update your mobile number:

1. Locate the nearest Aadhaar Enrolment Centre via the UIDAI website.
2. Carry your original Aadhaar card and a valid photo ID proof.
3. Fill out the Aadhaar Update/Correction Form available at the centre.
4. Submit the form along with your documents to the executive.
5. Provide your new mobile number for update.
6. Biometric authentication may be required.
7. After successful verification, you will receive an acknowledgment slip with a URN.

The update usually takes up to 90 days to reflect in the UIDAI database.

Tips to Avoid OTP Failure During Exam Registrations

To ensure a smooth exam registration process without OTP failures, candidates should follow these tips:

• Update Your Mobile Number in Aadhaar Well in Advance: Don’t wait until the last moment to update your mobile number. Complete the process at least a few weeks before exam registrations open.
• Keep Your Mobile Number Active: Ensure your mobile number is active and has sufficient balance or data to receive OTPs.
• Use a Reliable Network Provider: Opt for telecom providers with good network coverage in your area.
• Check Exam Portal Instructions: Some exams provide alternative verification methods if Aadhaar OTP fails. Read all instructions carefully.
• Use the mAadhaar App: The mAadhaar app allows you to carry your Aadhaar digitally and may provide additional verification options.
• Clear Browser Cache and Use Updated Browsers: Sometimes, technical issues on the user’s device can block OTP receipt.

What to Do If OTP Still Fails During Exam Registration?

If you have updated your mobile number correctly but still face OTP failure during exam registration, consider the following steps:

• Contact Exam Authority Support: Reach out to the helpline or support email of the exam conducting body. They may provide alternative verification methods or assist with technical issues.
• Try Different Devices or Browsers: Sometimes, device-specific or browser-related problems can cause OTP failures.
• Use Alternative Verification Methods: Some exams allow alternative ID proofs or biometric verification if Aadhaar OTP fails.
• Visit Aadhaar Enrolment Centre for Assistance: In case of persistent issues, the enrolment centre can help verify your identity and mobile number.
• Check UIDAI Server Status: Occasionally, UIDAI servers may be down for maintenance. Try again after some time.

Impact of Aadhaar Mobile Number Update on Government Job Exams

Government job exams increasingly rely on Aadhaar-based authentication to streamline candidate verification and prevent fraud. The mobile number linked to Aadhaar plays a pivotal role in this process. Here’s how updating your mobile number impacts your exam journey:

Checks to complete before you apply

OTP failures during exam registrations linked to Aadhaar mobile numbers can be a significant barrier for candidates aspiring for government jobs. The root cause often lies in outdated or unlinked mobile numbers in the Aadhaar database. To avoid these issues, it is crucial to verify and update your mobile number in Aadhaar well before the exam registration dates.

By following the steps outlined in this article, candidates can ensure smooth OTP verification, timely exam registrations, and hassle-free access to admit cards and results. Remember, proactive management of your Aadhaar details is key to a seamless government job exam experience.

For more updates on government exams, admit cards, and results, visit our dedicated pages at /admit-card and /sarkari-result.

Frequently Asked Questions

Q1: Can I update my mobile number in Aadhaar online without visiting the enrolment centre?

A1: Yes, you can update your mobile number online only if your existing mobile number is already linked to Aadhaar and you have access to it to receive OTP. If you do not have access to the old number, you must visit an Aadhaar Enrolment Centre.

Q2: How long does it take for the updated mobile number to reflect in the Aadhaar database?

A2: Typically, it takes up to 90 days for the updated mobile number to be reflected in the Aadhaar database after the update request is submitted.

Q3: What should I do if I do not receive the OTP during exam registration despite having the correct mobile number linked to Aadhaar?

A3: In such cases, check your network connectivity, try using a different device or browser, and contact the exam authority’s helpline for assistance. You can also verify the UIDAI server status to rule out technical issues.

Q4: Is Aadhaar OTP mandatory for all government job exam registrations?

A4: Many government job exams require Aadhaar OTP verification for identity authentication, but some may offer alternative verification methods. Always check the specific exam notification for details.

Q5: Can I link multiple mobile numbers to my Aadhaar?

A5: No, Aadhaar allows only one mobile number to be linked at a time. You need to update the existing number if you want to change it.

Related Resources

• Sarkari Naukri Application Guide
• UPSC Exam Preparation Tips
• How to Check Aadhaar Status