How do i reactivate a particular sim card to add the nin

How do I change the name on sim card to match with my nin, because my nin bears my marital name while my mtn line bears my father's surname

I want to change the nin on my phone number

Hi Chigozie, what kind of deactivation was done on your line. Is it NIN barring, or line termination due to dormancy. If it is line termination due to dormant line, you can...

How can I reactivate my mtn sim without visiting any outlet