A device and method and system for dynamically processing a random access response (RAR) signal to perform wireless communications is disclose. In some embodiments, the device is configured to receive one or multiple random access response (RAR) signals, wherein when the processor receives multiple RAR signals, it selects a RAR signal and responses to the selected RAR signal based on a content of the one or multiple RAR signals and proceeds with subsequent wireless communication using information contained in the selected RAR signal.