Abstract: A process for bi-directionally transferring data between a mobile phone and a computing device is provided. According to an exemplary embodiment of the present invention, a user may select between an uploading mode and a downloading mode. If the downloading mode is selected, a first data is firstly downloaded from the mobile phone to an intermediate device under a first master-slave protocol, where the intermediate device herein acts as a master device under the first master-slave protocol. Thereafter, the first data is further transmitted from the intermediate device to the computing device under a second master-slave protocol, where the intermediate device herein acts as a slave device under the second master-slave protocol. If the uploading mode is selected, a second data is firstly transmitted from the computing device to the intermediate device under the second master-slave protocol, where the intermediate device herein acts as a slave device under the second master-slave protocol.