WiMAX (Worldwide Interoperability for Microwave Access) is a long-range wireless networking standard developed by IEEE to solve the point to multipoint broadband outdoor wireless network problem. WiMAX provides wireless communication to areas where cable infrastructure is inadequate. It is designed to provide higher data rates. WiMAX forum promised to provide better service in means of better coverage and quality but at present in Dhaka city Bangladesh, WiMAX technology is unable to support the coverage or throughput recommended by WiMAX forum. End user subscribers are not getting their assigned bandwidth due to poor network arrangement, tall building density and vast population density. The essential necessity for this research is to improve coverage and quality and thereby making WiMAX technology as the best for wireless and mobile broadband communications. This paper focuses on the RSSI improvement of WiMAX network in Dhaka city, Bangladesh by making a site survey in real life and then analyzing with collecting data with theoretical data to evaluate the end user improvement by applying research solution.