This cheat was gotten from my own experience when i was trying to get 2.5gb for 100 naira but instead of the 2.5gb i endup geting 50mb for 100naira for 1week.
Put in yur etisalat line into yur phone and make sure u have up to 100 naira in yur sim and dial 4992*2#.
Ignore any message and dial *228# to see the good work examgurus
thanks