Every SIM card in Nigeria must be linked to a National Identification Number (NIN). If your line is not linked, it can be barred from calls and data. This guide shows how to link NIN to SIM on MTN, Airtel, Glo and 9mobile, and how to confirm that the link worked.
What You Need Before You Link NIN to SIM
- Your 11-digit NIN. If you have forgotten it, see how to check NIN number.
- The SIM card you want to link, inserted in your phone.
- Some airtime, in case a network charges for the request.
How to Link NIN to SIM on MTN
- Dial *785# on your MTN line.
- Enter your 11-digit NIN when prompted.
- Wait for a confirmation SMS.
Some guides also mention dialing *785*NIN# directly. You can also link your NIN through the MyMTN app or at an MTN service centre.
How to Link NIN to SIM on Airtel
- Dial *121# on your Airtel line.
- Choose the NIN linking or NIN capture option.
- Enter your NIN and confirm.
Airtel also accepts NIN submissions through its app and service centres.
How to Link NIN to SIM on Glo
- Dial *109# on your Glo line.
- Enter your NIN when asked.
- Wait for confirmation.
How to Link NIN to SIM on 9mobile
Dial *200*8# and follow the prompts to enter your NIN. You can also visit a 9mobile experience centre with your NIN slip.
Network menus can change. If a code does not respond, use your network’s app or visit a service centre.
How to Confirm That Your NIN Is Linked
After you link NIN to SIM, dial *996#. This NCC harmonized code is used for SIM registration and NIN-SIM linkage verification. It shows the phone numbers connected to your NIN.
If a number you own does not appear, repeat the linking process or visit your network’s service centre.
What If Your SIM Is Already Barred?
If your line was barred because it was not linked, take a valid ID and your NIN details to your network’s service centre. After the link is confirmed, the network can restore your line. Do not pay roadside agents to “unblock” your SIM, as this can expose you to fraud.
Common Problems and Fixes
- NIN not found: check that you typed all 11 digits correctly.
- Name mismatch: if your SIM registration name differs from your NIN record, visit a service centre to update your details.
- Code not responding: restart your phone, check signal and try again later.
- No confirmation SMS: wait a few hours, then check with *996#.
Why Linking Matters
Linking your NIN helps protect you from SIM fraud and makes it easier to recover your line if your phone is lost. It is also required for many banking and fintech services. Keep your number linked to your own NIN, and never let someone else register a SIM with your identity.
You may also need your BVN for banking. See our guide on how to check BVN.
Quick Reference
| Network | Code to link NIN to SIM |
|---|---|
| MTN | *785# |
| Airtel | *121# (NIN option) |
| Glo | *109# |
| 9mobile | *200*8# |
| Check linked numbers (all) | *996# |
Tips to Protect Your NIN and SIM
- Never share your NIN or OTPs with strangers.
- Check the numbers linked to your NIN with *996# every few months.
- Report any unknown number linked to your NIN to your network.
- Keep your NIN slip in a safe place, and store a copy securely.
If you need to confirm your own number first, read how to check my phone number.
Frequently Asked Questions
How do I link NIN to SIM on MTN?
Dial *785# and enter your NIN.
How do I know if my NIN is linked?
Dial *996# to see the numbers linked to your NIN.
Can I link one NIN to several SIMs?
Yes, you can link your NIN to the lines you own, but each SIM must be properly registered.
What if my SIM is barred?
Visit your network’s service centre with a valid ID and your NIN.
For official information, visit the NIMC website.
Oladepo Babatunde (Prince Babatee Tunde) is a Computer Scientist, researcher, and professional content writer with a Higher National Diploma in Computer Science from Kwara State Polytechnic, Nigeria.
With a background in technology and a passion for clear communication, Babatunde specializes in creating thoroughly researched, reader-focused content on productivity, personal development, home living, and technology. Every article he writes is backed by extensive research and fact-checking to ensure readers receive accurate, actionable information.
As a freelance writer, he has helped brands and publications deliver content that educates, engages, and empowers their audiences. His mission at Vibena is simple: make complex topics easy to understand and help Nigerians live smarter, more productive lives.
