A cellular module (202, 410), comprising: a processor (304, 404); a memory (306, 406) in communication with the processor; at least one output pin having a voltage level configured to be controlled by the processor to request a first power level for use by the cellular module during periods wherein radio frequency 'RF' communication is not being performed; and request a second power level for use by the cellular module during periods when RF communication is being performed, wherein the second power level is a higher power level than the first power level; and instructions stored in the memory, for performing actions by execution of the processor, comprising: determining, at the cellular module, an appointed time for a status change of an RF communication; determining a time to signal one or more power supplies (208, 210, 414), based at least in part on the appointed time for the status change of the RF communication, so that the one or more power supplies are ready to change to supply power at the second power level at the appointed time for the status change of the RF communication; and changing a voltage on the at least one output pin at the determined time to cause the one or more power supplies to transition from the first power level to the second power level; wherein determining the time to signal the one or more power supplies is based at least in part on: an ambient temperature; or an age of a battery powering the cellular module. a processor (304, 404); a memory (306, 406) in communication with the processor; at least one output pin having a voltage level configured to be controlled by the processor to request a first power level for use by the cellular module during periods wherein radio frequency 'RF' communication is not being performed; and request a second power level for use by the cellular module during periods when RF communication is being performed, wherein the second power level is a higher power level than the first power level; and request a first power level for use by the cellular module during periods wherein radio frequency 'RF' communication is not being performed; and request a second power level for use by the cellular module during periods when RF communication is being performed, wherein the second power level is a higher power level than the first power level; and instructions stored in the memory, for performing actions by execution of the processor, comprising: determining, at the cellular module, an appointed time for a status change of an RF communication; determining a time to signal one or more power supplies (208, 210, 414), based at least in part on the appointed time for the status change of the RF communication, so that the one or more power supplies are ready to change to supply power at the second power level at the appointed time for the status change of the RF communication; and changing a voltage on the at least one output pin at the determined time to cause the one or more power supplies to transition from the first power level to the second power level; wherein determining the time to signal the one or more power supplies is based at least in part on: an ambient temperature; or an age of a battery powering the cellular module. determining, at the cellular module, an appointed time for a status change of an RF communication; determining a time to signal one or more power supplies (208, 210, 414), based at least in part on the appointed time for the status change of the RF communication, so that the one or more power supplies are ready to change to supply power at the second power level at the appointed time for the status change of the RF communication; and changing a voltage on the at least one output pin at the determined time to cause the one or more power supplies to transition from the first power level to the second power level; wherein determining the time to signal the one or more power supplies is based at least in part on: an ambient temperature; or an age of a battery powering the cellular module. an ambient temperature; or an age of a battery powering the cellular module.