Please note & stay safe
Belmadeng is an independent study platform and is not affiliated with NIMC. This is an informational guide — enrol, check, retrieve or modify your NIN only through official NIMC channels (nimc.gov.ng, the NIMC self-service portal, the official NIMC MobileID app, or an accredited enrolment centre). Never share your NIN, OTP or personal details with unofficial websites, apps or people, and never pay “agents” promising shortcuts.
Why it’s required
The government requires every SIM to be linked to a NIN. SIMs that are not linked can be barred, so linking keeps your line active.
What you need
- Your NIN (check it with *346# if unsure).
- The SIM/phone number you want to link.
- Details that match your NIMC record.
How to link
You can link through your network’s official channels:
- The network’s USSD code, app or website for NIN submission.
- At the network’s official shop/agent.
You submit your NIN, the network validates it against NIMC, and on success your SIM is linked. Each network (MTN, Glo, Airtel, 9mobile) publishes its own linking steps — use only official ones.
Linking several SIMs
You can link multiple SIMs that genuinely belong to you to your NIN. Be cautious about lines you don’t recognise appearing under your NIN.
Checking your linked SIMs
Networks and NIMC provide ways to see the lines tied to your NIN; if you spot an unfamiliar number, report it through official channels rather than panicking.
Stay safe
Link only through official network channels. Never send your NIN or OTP to a “linking agent” online, and don’t let anyone register a SIM with your NIN without your consent.
Why linkage is mandatory
Linking your NIN to your mobile number(s) is mandatory under the regulator's directive, on national-security and identity-integrity grounds. The practical stakes are real: SIMs not linked to a valid NIN risk being barred from the network. So every active subscriber is expected to enrol for a NIN (if they haven't) and link it to their SIM(s). The linkage itself is free through official channels — be wary of anyone charging to do it — and it's a one-time step per number that keeps your line active and compliant.
How to link with your VNIN
Linkage is designed to protect your privacy by using your Virtual NIN (VNIN) rather than your raw number. The general flow: confirm your NIN (via *346# or your slip), generate your VNIN (via *346*3*NIN*AgentCode# or the NIMC app), and submit it to your network through the channel they provide (USSD, app, website or a service centre). Your provider then validates it against the NIMC database and links the SIM. There are also network USSD options (such as *996#) for the linkage step — follow your provider's official instructions.
Limits on SIMs and numbers
There are limits worth knowing. You can generally link multiple phone numbers to one NIN — commonly stated as up to seven numbers (excluding certain IoT/device SIMs) — and the regulator has set a cap of four SIMs per network per person. So one NIN can cover several of your lines across networks, within those caps. If you have more numbers than allowed, you'll need to consolidate. Confirm the current limits and linkage steps with your provider or the regulator, as rules can be updated.
Frequently asked questions
Is NIN-SIM linkage compulsory?
Yes — every SIM must be linked to a NIN; unlinked SIMs can be barred.
How do I link my NIN to my SIM?
Submit your NIN through your network’s official USSD, app, website or shop; the network validates it against NIMC and links your SIM.
How many SIMs can I link to my NIN?
You can link multiple SIMs that genuinely belong to you. Watch for unfamiliar lines appearing under your NIN.
What happens if I don’t link my NIN to my SIM?
Unlinked SIMs can be barred from making calls or using data, so link promptly.
How do I check which SIMs are linked to my NIN?
Networks and NIMC provide official ways to see the lines tied to your NIN; report any unfamiliar number through official channels.
Why do I have to link my NIN to my SIM?
It's mandatory under the regulator's directive on national-security and identity-integrity grounds. SIMs not linked to a valid NIN risk being barred from the network, so every active subscriber is expected to enrol for a NIN and link it to their SIM(s). The linkage is free through official channels.
How do I link my NIN to my SIM?
Using your Virtual NIN (VNIN) for privacy: confirm your NIN (via *346# or your slip), generate your VNIN (via *346*3*NIN*AgentCode# or the NIMC app), and submit it to your network through their channel (USSD, app, website or service centre). Your provider validates it against the NIMC database and links the SIM. Network USSD options like *996# also exist.
Is SIM-NIN linkage free?
Yes — the linkage itself is free through official channels. Be wary of anyone charging to do it for you. It's a one-time step per number that keeps your line active and compliant.
How many SIMs can I link to one NIN?
You can generally link multiple numbers to one NIN — commonly stated as up to seven (excluding certain IoT/device SIMs) — with a regulator cap of four SIMs per network per person. Confirm the current limits with your provider, as rules can be updated.
What happens if I don't link my NIN to my SIM?
Unlinked SIMs risk being barred from the network. To keep your line active and compliant, enrol for a NIN if you haven't and link it to your SIM(s) via your VNIN through official channels.