The paper addresses optimizing two of the most important performance parameters, packet loss, and delay, in the critical path optimization of LTE and 5G networks using metaheuristic algorithms to play a vital role in the smartphone user experience. In this context, nine metaheuristic algorithms, such as WOA, PSO, and ABC, have been studied for their effectiveness in various slices of networks: eMBB, URLLC, and mMTC. It can be seen from the results that WOA performed the best: it reduced packet loss by 31% and delay by 6.3 ms; PSO followed closely with a 30% packet loss reduction with a decrease of 6.1 ms in delay. In most scenarios, ABC accomplished good results with a packet loss reduction of 29% and a delay decrease of 6 ms in mMTC scenarios. These results emphasize how selecting appropriate algorithms based on the intended network slice is crucial for optimizing resource utilization and network efficiency. It provides a quantitative framework for assessing and improving the reliability and responsiveness of an LTE/5G network. It encourages more research in hybrid optimization techniques and real-time adaptation mechanisms for further improvements

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