An apparatus, a system and a method of controlling a subscriber identity module (SIM) operation state in a multiple SIMs radio. For example, while operating a first packet switch (PS) service on a first SIM, a multi-SIM radio is configured to receive a PS paging signal indicating on arrival of a second PS service configured to operate on a second SIM. The radio may determine a priority of the first PS service, and a priority of the second PS service. The radio is configured to activate the second SIM, for example, if the priority of the second PS service is higher than the priority of the first PS service operating on the first SIM.