FOLLOW THE STEPS BELOW:-
Just dial
*567*1#
*567*2#
*567*3#
Minimum of #30 Will be deducted from your account and you will be given N33,600 worth of Airtime.
Make sure you are on MTN iPulse or True Talk.
It last for just a week.. If you are eligible. You will receive it instantly. Try it
Goodluck.