Simply dial *449# on your mobile phone with MTN line
The screen shown in the picture above shows up
Type 1 and send to get 500MB data free on MTN line or
Type 2 and send to get 1GB data for free on your MTN line
The free data is valid for 7days.
This is just a free offer from MTN and therefore does not require any software, tricks or tweaks.
The data you get can be used on all devices.
Opting into this free offer does not affect your data plan or call prepaid plan
However, there are few persons who might not be eligible for this free data offer.