How to Unlock Your Blocked SIM Card Yourself With *996# in 2026
If your SIM has been blocked for not linking your NIN, dial *996#, follow the prompts to submit your National Identification Number, and wait for verification — once it passes, the network unblocks the line on its own. You don't need to visit a service centre for this specific fix, and it works the same way on MTN, Airtel, Glo, and 9mobile because *996# is a shared code across all four networks.
Here's exactly how the process works, how long verification actually takes, and what to do if the code doesn't unblock your line.
- Dial *996# from the blocked line — no internet or app needed.
- Enter your 11-digit NIN exactly as it appears on your NIMC slip or card.
- Your network checks the NIN against the NIMC database in the background.
- If it matches your registration details, the line is unblocked automatically, usually within minutes to a few hours.
- If it doesn't match, you'll need to fix the mismatch at NIMC before trying again.
Why Your SIM Got Blocked
Nigerian telecom regulation requires every active SIM to be linked to the owner's NIN. If a line was never linked, or the NIN details on file don't match NIMC's records, the network restricts outgoing calls, SMS, and data until it's resolved. This isn't unique to one network — MTN, Airtel, Glo, and 9mobile all enforce it under the same directive, which is why the same *996# code works across every network rather than needing a different one per provider.
Step-by-Step: Unlocking Your SIM With *996#
- Have your NIN ready. This is the 11-digit number from your NIMC slip, National ID card, or the NIMC mobile app. Double-check every digit before you start.
- Dial *996# from the blocked line itself — the code has to run on the number that needs unblocking, not a different phone.
- Follow the on-screen menu and select the option to submit or link your NIN when prompted.
- Type in your NIN carefully and confirm. A single wrong digit will cause the verification to fail.
- Wait for the confirmation message. Your network sends your NIN to NIMC for verification in the background — you don't need to do anything else while this runs.
- Check your line once you get an SMS confirming the match. Calls, SMS, and data typically resume without needing a restart, though rebooting your phone can speed up network recognition.
How Long Verification Takes
Most successful verifications complete within a few minutes to a few hours, since the check runs automatically against the NIMC database. That said, timing can vary depending on network load and how busy NIMC's verification system is at that moment. If it's been more than 24 hours with no confirmation SMS either way, it's worth dialing *996# again to confirm your submission actually went through.
| Situation | What usually happens |
|---|---|
| NIN matches your SIM registration exactly | Line unblocks automatically, often within minutes to a few hours |
| NIN is valid but details don't match SIM registration | Verification fails; details must be corrected at NIMC first |
| NIN was mistyped | Verification fails; simply retry with the correct number |
| NIN has never been linked to any line | Some networks will link it fresh; others may ask you to visit a service centre |
If Verification Fails
A failed verification almost always comes down to a mismatch between what you typed and what's on record — not a fault with the *996# code itself. Before assuming something is broken, work through these in order:
- Re-check the NIN itself. Retrieve it again from your NIMC slip, the NIMC app, or by dialing *346# to confirm you have the right 11 digits.
- Confirm your name and date of birth match what's on file at NIMC — small inconsistencies, like a missing middle name, can cause a mismatch.
- Try again after a few hours. Occasional system downtime on either the network's or NIMC's side can cause a temporary failure that resolves on retry.
- Visit a NIMC enrolment centre if the mismatch persists — they can correct your registered details directly.
- Visit your network's service centre as a last resort if *996# consistently fails despite correct details, since a support agent can check for account-specific issues.
Final Recommendation
Do this first: dial *996#, submit your correct NIN, and give it a few hours before assuming anything is wrong.
Only escalate to a physical visit if verification keeps failing after you've confirmed your NIN and personal details are accurate — at that point, the issue is usually a records mismatch that needs fixing at NIMC rather than anything USSD can resolve.
Once unblocked, dial *996# again anytime to check which numbers are linked to your NIN.
Frequently Asked Questions
Yes. It is a shared code that works across MTN, Airtel, Glo, and 9mobile for submitting or checking your NIN-SIM linkage.
No. It's a USSD code, so it works even on a completely blocked line with no active data or call service.
Dial *346# from the number you originally registered with NIMC to retrieve it, or use the NIMC mobile app if you have it installed on another device.
The NIN-SIM linkage exercise itself has generally been free of charge, though related codes like NIN retrieval can carry a small fee. Your network's prompt will show if any charge applies before you confirm.
Re-dial *996# to confirm your submission went through, double-check your NIN and personal details for a mismatch, and if it still fails, visit a NIMC enrolment centre or your network's service centre.
Yes, NIMC allows multiple phone numbers to be linked to a single NIN, so unblocking one line doesn't prevent you from linking others the same way.