How do you reuse an already used mtn airtime card?

To reuse an already used MTN airtime card, you typically cannot directly reuse it for reloading as it is a one-time use card. However, if the card is still valid and the airtime has not been fully consumed, you can check your balance using your phone. If you want to use a similar card again, you'll need to purchase a new airtime card. Always ensure to keep track of your balance and usage to maximize your benefits.