The Nigerian Communications Commission (NCC) has mandated that all active mobile lines must be linked with a valid National Identification Number (NIN). Failure to comply can lead to full SIM disconnection.
This comprehensive guide provides expert, step-by-step instructions on how to successfully link your NIN to your MTN, Glo, Airtel, and 9mobile lines. We cover all official methods, from USSD codes to physical service centres.
Requirements / What You Need
Before you begin the process of linking your NIN to your mobile line, ensure you have the following items ready. Proper preparation prevents delays, especially with network issues or at busy service centres.
- Your 11-digit National Identification Number (NIN): This is the most critical item. You can find it on your NIN slip, the NIMC mobile ID app, or by dialing *346# on the phone number you used for registration.
- The Active SIM Card: The phone line you wish to link must be in your phone and active. You will receive verification codes on it.
- A Valid Form of ID: While often not required for USSD, you may need it at an outlet. Acceptable IDs include your NIN slip, Driver’s License, International Passport, or Voter’s Card.
- Your Registered Details: The name on your SIM registration must reasonably match the name on your NIN. Major discrepancies (e.g., “Adebayo” on SIM vs “Adeboye” on NIN) will cause failure.
Important Note: The NIN-SIM linkage is free of charge when using the official USSD or operator apps. If you visit a cyber café or an agent, they may charge a service fee of ₦500 to ₦1,000 for assistance. Always request a receipt.
Step-by-Step Process
Step 1: Choose Your Preferred Linking Method
You have three main options: USSD code, the telecom operator’s mobile app, or visiting a physical service centre. The USSD method is the most common and can be done from your phone anywhere. If you experience persistent network errors with USSD, try the mobile app (which requires internet data) or visit an accredited outlet.
Step 2: Dial the Correct USSD Code for Your Network
On the phone with the SIM you want to link, dial the unique code. For MTN, dial *785#. For Airtel, dial *121*1#. For Glo, dial *109*NIN# (replace “NIN” with your 11-digit number). For 9mobile, dial *200*8#. A menu will pop up on your screen guiding you.
Step 3: Enter Your 11-Digit NIN
The USSD menu will prompt you to input your National Identification Number. Type it carefully and confirm. A common error is mixing up the number ‘0’ with the letter ‘O’. Double-check before sending. You will receive an SMS confirming the submission.
Step 4: Wait for Confirmation SMS
After submission, you will get a message stating your request is being processed. This can take from a few minutes to 48 hours. Do not re-submit multiple times in panic, as this can jam the system and delay your request further. The final confirmation SMS will state your NIN has been successfully linked.
Step 5: Verify Your Linkage Status
To be sure the linkage worked, you must verify. Dial *996# for MTN, *121*1# for Airtel, *109# for Glo, or *200*8# for 9mobile and follow the menu to check status. Alternatively, you can use the NIMC NIN verification portal online. If it fails, note the error message before trying again.
Alternative Methods
If the USSD method fails repeatedly due to network congestion or system errors, you have two reliable alternatives. The first is using your network provider’s official mobile app, such as MyMTN or Airtel Thanks app. This method requires a stable internet connection. Log into the app, navigate to the NIN linkage section (often under “Services” or “Profile”), enter your details, and submit. This portal-based method is often more stable than USSD and provides a digital trail.
The second and most effective alternative is visiting a physical service centre. Go to any official MTN, Airtel, Glo, or 9mobile service centre, or an accredited agent outlet across states like Lagos, Abuja, or Rivers. Bring your phone, the SIM, and your NIN slip or ID. An agent will process it for you directly on their system. This option is best if you have name discrepancies or if your SIM was originally registered by someone else, as the agent can help rectify it on the spot.
Common Problems and Solutions
Problem: “NIN Already Linked to Another Number” Error
This is a frequent issue where your NIN is tied to an old, forgotten SIM. The NCC allows one NIN to be linked to a maximum of 4 lines per network, but an old registration may be occupying a slot.
Solution: You must visit a service centre of the network showing the error. For example, if MTN shows this, go to an MTN centre. Request a NIN audit or disassociation of the unknown number. You will need to present your NIN and valid ID. They will remove the old link, freeing the slot for your current SIM.
Problem: “Details Do Not Match” or Failed Verification
Your SIM registration name (e.g., “Tunde Lawal”) doesn’t perfectly match your NIN record (e.g., “Babatunde Lawal”). Even minor spelling differences can cause failure.
Solution: Do not keep retrying USSD. Visit the nearest NIMC enrolment centre to update your NIN data first (like adding a middle name). Alternatively, go to your network’s service centre; they can sometimes help correct the SIM name to align with your NIN if you provide supporting documents.
Problem: USSD Not Working or “Transaction Failed”
You dial the code but get no response, an error, or a message saying “Service Temporarily Unavailable.” This is often due to network congestion, especially on month-ends.
Solution: Try during off-peak hours like early morning (7-9 AM) or late night. Ensure you have sufficient airtime balance, as some codes require it. If it persists for over 48 hours, switch to the network’s mobile app or visit a physical outlet, as their direct systems are often more reliable than the public USSD gateway.
Fees, Costs and Timeline
The NIN-SIM linkage process is officially free of charge when you use the approved USSD codes or your network provider’s official app. You should not pay any fee to MTN, Glo, Airtel, or 9mobile for this service.
However, if you seek assistance at a cyber café, an accredited agent kiosk, or a third-party service centre, they typically charge a convenience fee. This service charge ranges from ₦500 to ₦1,500 across different states, with Lagos and Abuja often at the higher end. Always request a receipt for any payment made.
For the timeline, a successful USSD submission is typically confirmed within 24 to 48 hours. If you visit a physical service centre, the update can be instant or take a few hours. If your submission requires a NIN data correction, the timeline extends to 1-3 weeks, as you must wait for NIMC to update its database before retrying the linkage.
Warnings and Scams to Avoid
- Beware of Fake USSD Codes and Phishing Links: Scammers send SMS or WhatsApp messages with fake codes like *123*NIN# or links to fraudulent portals designed to steal your NIN and personal details. Only use the official codes (*785#, *121*1#, etc.) directly from your network’s website or customer care.
- Avoid Agents Requesting Your Phone or PIN: Do not hand over your phone unlocked to an agent at a kiosk. They should guide you to dial the code yourself. Never disclose your bank PIN, BVN, or OTP to anyone claiming it’s needed for NIN-SIM linkage.
- Ignore Threats of Immediate Disconnection: You may receive calls or texts claiming your line will be barred within hours if you don’t “revalidate” via a link. This is a scare tactic. The NCC announces deadlines publicly through official channels.
Acceptance, Use and Next Steps
Once successfully linked, your NIN is accepted across all major Nigerian institutions. It is mandatory for new SIM registration, bank account updates (BVN linkage), international passport applications, and tax identification (TIN) with the FIRS. Telecom operators share this verified data with the NCC and NIMC as part of the national digital identity framework.
Your immediate next step is to verify the linkage for all your lines. Use the USSD check codes mentioned earlier to confirm each MTN, Glo, Airtel, and 9mobile line you own. If you have more than four lines on a single network, you must prioritize and may need to delink some.
A key limitation to understand is that NIN-SIM linkage does not automatically update your bank records. You must still visit your bank separately to link your BVN with your NIN. Furthermore, ensure your details are consistent across all platforms to avoid future verification hurdles with government services.
Frequently Asked Questions
What happens if I don’t link my NIN to my SIM?
According to NCC directives, your line will be fully barred from making and receiving calls, SMS, and using data. You will only be able to dial emergency numbers. To restore service, you will have to complete the linkage, which may involve visiting a service centre and could take additional days.
Can I link one NIN to multiple phone numbers?
Yes, but with limits. The NCC allows one individual to link their NIN to a maximum of 4 phone lines per mobile network operator. This means you can have up to four lines each with MTN, Airtel, Glo, and 9mobile, all linked to your single NIN.
How do I link my NIN if my SIM was registered by someone else?
You must perform a SIM Swap or Change of Ownership first. Visit the network’s service centre with a valid ID and the registered owner (if possible). Change the registration to your name and details. Once the SIM is fully in your name, you can then link your own NIN to it.
I lost my NIN slip. How can I retrieve my NIN?
Dial *346# on the mobile number you used during your NIMC enrolment. Your NIN will be displayed on screen and sent via SMS for a small fee (approx. ₦20). You can also use the NIMC mobile ID app or visit any NIMC enrolment centre with your biometrics for retrieval.
Is there a deadline for NIN-SIM linkage?
The NCC sets periodic deadlines, but they are often extended. As of 2024, the policy is enforcement-driven, with networks conducting gradual barring of non-compliant lines. To avoid sudden disconnection, it is advised to complete your linkage immediately and not wait for any announced deadline.
How do I link my NIN for a child or minor?
Minors must have a NIN. A parent or guardian registers the child at a NIMC centre to get one. To link the child’s SIM, the parent uses the USSD code from the child’s phone and inputs the child’s NIN when prompted. The SIM should ideally be registered in the child’s or guardian’s name.
Disclaimer
This guide is for informational purposes based on publicly available NCC directives and official network operator procedures. While we strive for accuracy, specific processes may change. We are not affiliated with the NCC, NIMC, or any telecom operator. For the most current official information, please contact your network’s customer care or visit the Nigerian Communications Commission website.