To get the free data and the airtime bonus you need to purchase a new mtn sim or line.
The sim should be a 4G Sim card that came with yafun yafun plan.
All new sims are eligible for the plan, the load airtel worth N1000 to the line.
That should be done after the activation and successful registration process.
Once you load the airtel data worth of 3.5GB or 4GB will be redeemed to your line.
That also came with an Airtime bonus of N7000 or more.
You can check if the mtn free data and airtime has been redeemed to your line by dialing the number code to
NOTE: The 1000 Airtime should be load with normal process or procedures which is used to load card or airtime