Just like the Etisalat smartphone offer, Mtn has also decided to reward its customers anytime they purchase a new smartphone with 100% bonus on every data plan purchased.

The new offer which is dubbed "Mtn Kpalasa data bonus offer" will give you double the worth of any Mtn data plan you purchase whenever you buy a new smartphone from any store in Nigeria and the offer is valid for 6 months. What this means is that if you buy a 3.5gb data plan which cost N2,000, you will get 7gb data instead.

Eligibility:
To be eligible for this offer, all you need to do is just to purchase a new smartphone from any mobile store in Nigeria. It works on both old and new sim cards.

How To Participate In This Offer
==> Purchase a new smartphone from any store in Nigeria.
==> Insert your registered Mtn sim card.
==> Just wait for a few minutes and you should receive a confirmation message like "CONGRATULATIONS! Your smartphone has been activated to enjoy DOUBLE on any data bundle you buy for the next 6mths. Dial *131*1# to buy your preferred data plan."
==> Just dial *131# and select any data bundle of your choice.

Note: There is also a trick to enjoy this offer even without purchasing a new smartphone. You can read more on it HERE.

Source: http://www.yomitech.com/2016/08/get-100-data-bonus-when-you-purchase.html