Sim card registration has become an inevitable thing, unless you want yours to be deactivated from your Network provider. After mtn asked some customers to re-register their sim again, some people still complain of not being able to make calls with their lines, meaning that the sim cards were not properly registered.
Below are the steps on how to confirm your sim registration status
For Glo, text REG to 746
For MTN, text REG to 789
For Airtel Nigeria, dial *746#
For Etisalat Nigeria, dial 746 and follow the voice commands.
Try yours now, and Drop your comments below.