What i have here is mtn free 750mb tweak and i know you would surely love it cos it’s real and working perfectly. 
Now grab your New or Old MTN sim
now and tweak this Imei below and get free 750mb from MTN

Imei:- 355626052069724
                      or
        ( Change the last 4digit by analyzing)   

 After successful tweaking, send Mifi or Jumia to 13