Ameer!! please first carry out research at your end about call centers then think of opening a call center. The best thing for you is to visit http://www.pakistancallcenters.com and read an article “how to set up and operate successfully a call center in Pakistan” also see a detailed feasibility report in http://www.pseb.org.pk
I am sure you will benefit a lot from these reports. Then get i touch with Aezad.