Abstract: An electronic device may include wireless circuitry having one or more radios and one or more antennas. For some device configurations such as during a device low-power mode, a radio (operating in a radio on-off mode) may alternate between on and off states based on a duty cycle to reduce power consumption and increase device battery life. Radio operation in the on-off mode and device operation in the low-power mode may accommodate other radio operations such as emergency broadcast message reception, radio operations under an allocated power budge, user equipment periodic registration and update operations.