- Incomplete registration
- Computer errors
- Linking NIN to too many SIM cards
- Poor backend integration from NIMC
- Network problem
Following the federal government’s directive, telecommunication companies in Nigeria such as MTN, Airtel, GLO and 9mobile have barred over 70 million subscribers from making calls over failure to link their SIM with the National Identity Number (NIN).
However, emerging developments indicate that some Nigerians who have linked their SIM with their NIN are also having difficulty making calls.
