Realizing that you use a Nokia Device, you have been carefully selected for the Double-DOUBLE data promo. Dial *141*11*2*2# for 100MB at N300
With This, You Get 100MB Access to The Internet. Though they didnt specify the duration, i believe it can last upto 3days. Also, I believe this can work for other phone users like Samsung, Tecno Etc. Even though they specified Nokia.
I advice you try it on Nokia Torch Phones because my sim was on a Torch phone when they sent me the Sms