Where did you get this from? I never knew there was a 2 months plan either! Is the 2 months plan still valid?
No, it was way back in March 2011, all above plans were launched as promotional offers till apr 2011,
Point is once they have regularized the plans,(MTNL DELHI announced the regularization of these plans on their website) now why they are taking back, they are in loss or profit is not my concern. MTNL must have thought before regularizing these plans.