If you have an MTN Nigeria sim card, you may probably earn UpTo 20k airtime on your simcard, but this actually works for those who have issue with linking their NIN number.
MTN now gives free 20k airtime for any number that linked NIN after MTN stopped that number from making callings.
So here we go!
How To Link Your NIN number To Your MTN Sim
If your simcard already encounter this problem then follow this few steps and link your phone number with NIN.
~ Dial *785*NIN number#
~ You can easily check if the process is done by dialing *346# and reply with 1, You can confirm that the NIN is linked to the number.
~ After few moments, you can dial *556# or *559*64# to check your free 20k airtime, if you are given then congratulations to you if you didn’t then try checking later.
Thanks for your time, have a great day.