A system and method of re-distributing power output by a portable mobile communications device while operating in dual transfer mode (DTM) is disclosed. The device determines if more than one uplink slot is active and if DTM is active. If so, power can be separately regulated for packet switched and carrier switched uplink slots. The device determines whether the circuit switched slot is being used for a voice call that is not in a handsfree or speakerphone mode and evaluates factors associated with the current operating conditions. New power settings are calculated based on the mode for the active circuit switched slot and the factors associated with the current operating conditions of the device. The new power settings are then applied to the active uplink slots such that power is re-distributed on a per slot basis that is not necessarily divided equally among all active slots.