As the current issues happening around Nigeria, NCC direct all telecommunication companies to stop registration of new lines and old lines should be re-registered with NIN.
Below are steps on how you can check whether you need to re-registered or not of MTN, Airtel, 9mobile, GLO.
Confirm Your Mobile Number(s) Registration Status To Avoid Being Blocked By NCC.
MTN – dial *789*1#
Airtel – dial *746#
9mobile – dial 746 or 200
Glo – text REG to 746 or 3456
Hope you grab something from this why not share this to others so that they can check too