From PTCL Website:
PTCL has introduced a new 2Mbps Broadband data rate in addition to its existing Broadband data rate packages. The New 2 Mbps data rate is offered to the customers at Rs. 1499 / month with unlimited download. The new 2Mb data rate as a promo will be offered to all existing 1Mb customers who upgrades to 2Mb at the existing monthly charges of 1Mb for a period of 3 Months without any additional charges. Post 3 months the prevailing monthly tariff of 2Mb of Rs 1499 will be applicable. Please note that this offer is only valid for the upgrade customers of 1Mb to 2Mbps.
Hope they offer for student package too with the discount.