9mobile has started to push the message and notifications to their eligible customers (both existing and new users) to activate the whooping offer.

When you receive the notification message, if you recharge N100, you will get N500 airtime and 375MB data and also the recharge of N200 will give you N1,000 airtime and 750MB data, and vice versa.
How To Check The Data Bonus And Airtime
You can always check your data balance by dialling
*228# and check your airtime balance by dialling
*232#.