Analysis of the behavior of smartphone applications is an important task. However, dynamic analysis including actual executions takes a significantly long time. For reducing this time, we proposed a method for accelerating analyses by increasing the speed of the time that was managed in the operating system. However, the errors of communications were not discussed in the previous work. In this paper, we compare the numbers of TCP errors with and without acceleration. We then show that the number of errors significantly increases by the acceleration. For this issue, we propose a method for decreasing the number of TCP errors by extending the retransmit timeout (RTO). We evaluate the proposed method with an actual Android device and show that the method can reduce the number of TCP errors by 63% at most.