As we have moved into 21st century Cellular services have become an integral part of our lives. Around 5 billion people in the world are using cellular services which are 70% of total world population and this number is increasing by every passing day. In Pakistan there are more than 100 million subscribers as of date and this number is also growing. Cellular services have become an important tool for organizations, students and every one. No one can imagine living without cell phone and this is the reason why whenever cellular services are affected they impact and reaction is always great.