This research presents an empirical investigation into WCDMA uplink transmits power for indoor and outdoor locations. Specifically, the uplink transmit power have been measured and analyze in different locations and specific time. Further, we investigate the relationship between uplink transmit power and received signal code (RSCP). The results will present in this research, can be use for not only optimizing a WCDMA handset design for the UMTS network, but also predicting battery life and examining WCDMA coverage.