The Embedded Subscriber Identity Module (eSIM) technology is a major change in global mobile communications, removing the need for physical SIM cards and allowing easy, wireless setup for mobile operator profiles. Even though e-SIM technology is growing around the world, its use in Nigeria has been slow because of several communication problems, such as setup failures, slow connections, devices not working well together, and unclear rules. This research looks at these problems from an engineering perspective and suggests technical ways to make networks more reliable and improve setup success. The study uses a mix of real-world tests, computer simulations, and analysis of network performance in different e-SIM setup situations. The simulation results show that communication reliability can be improved by up to 37% by using chunked wireless setup, flexible link scheduling, and better coordination of SM-DP+ servers.