It might have happened that you lost your NIMC slip that contains your personal information including your national identification number (NIN) thinking your sim would get blocked because of this. No, it’s possible to retrieve NIN number but with your registered sim card. This is very easy with ni requirements, all you need to do is just dial *346# on any sim card, it could be MTN, Glo, Airtel, or 9mobile. Do not worry, it works for all sims after dialing the code, with the instant you’ll get your NIN to link to your mobile sim card.
To register and get a NIN Number kindly visit the link https://www.nimc.gov.ng/enrolcen.html to check any National id enrollment center close to you and get your NIN Number to merge with your mobile SIM card to start using.
Here’s a simple way to retrieve your nin number on any sim card you are using.