Web Service Tool (WST) application is a telecom users′ package processing application for Robi. Through this application millions of users get updated packages during promotions or in any kind of social events. Millions of requests are served within few hours. Transaction per second (TPS) of this application is more than 30. We have used queue mechanism with multi-threading for ensuring TPS more than 30. It has been running at the premise of Robi for more than 2 years.