Managing a transmission power level

A user device may include a transmission power manager to control a transmission power level of a wireless transceiver based on a location of a human body proximate the user device as detected by a proximity sensor. In response to at least one of a power up of the user device or initialization of a wireless transceiver, the transmission power manager may restrict a transmission power level of the wireless transceiver to one of a plurality of power states. The transmission power manager may then operate to detect a step in proximity sensor data obtained by the proximity sensor. Then, in response to detecting the step in the proximity data, the transmission power manager may restricting the transmission power level of the wireless transceiver and determine a proximity threshold value based at least in part on the detected step and the proximity sensor data.