MTN and Airtel have opened NIN Linkage for customers to connect with their SIM cards.
MTN NIN Linkage is :(https://mtnonline.com/nim)
Airtel NIN linkage is :(http://airtel.com.ng/nin)
MTN, Airtel Release Links For Customers To Connect Their SIM With NIN (See)
How will i know I’d my NIN registration was successful