This is an old tweak, but still active. It involved Imei Tweaking and when you succeed, you will be given 150MB every month over a period of 12 months with no data purchase and the accumulated gives will be 1.8GB of data for a year.
Now, you can tweak your Android Device IMEI for 150MB with etisalat Sim using IMEI below.
THE IMEI: 86119500431****
Analyzed the remaining four (4) digit number and after succeeded in Imei tweaking
Text T635 to 8186.
Once you succeeded, you will be given Etisalat 150MB automatically every Month for 12months