The main subject for this thesis is to study and implement the GSM/GPRS data module of the most public modem mobility communication system. It includes the uplink and downlink circuit design and the baseband single procession, then implement on the real smart-phone product. We study how to implement the data module and research the circuit system architecture and propose the equipment setup and measurement process. In this design, CX74017 transceiver IC is applied to implement GSM/GPRS data module. In the down link path, tri-band RF low noise amplifier, mixer, programmable gain amplifier controller, IQ de-modulator and PLL loop are investigate and studied. In the uplink path design, IQ modulator and VCO in the transceiver IC and the CX77304 for implementation of tri-band power amplifier are proposed with fairly good performance. The practical GSM/GPRS tri-band data module on the smart-phone product in this study is completely implemented and verified.