Abstract: In this study, a simple scheme to improve the performance of mobile cellular networks is presented by incorporating delay of voice end user to the new originating calls over handoff calls in a two-dimensional traffic model. Expressions for probability of forced termination of handoff calls and the blocking probability of new originating calls have been derived. It has been found from this study that the probability of forced termination of handoff calls is drastically reduced due to the incorporation of the delay of voice end user compared to the case when no delay of voice end user is used in the system. The results obtained from this study for performance improvement have been compared with the existing method of channel reservation scheme for handoff calls and have been found that the obtained results provide much better performance improvement by reducing the probability of forced termination and the blocking probability.