Method and system for coordinating protocol stack entities to share single radio resource

A system for coordinating protocol stack entities corresponding to a first subscriber identity card and a second subscriber identity card respectively to share a single radio frequency (RF) module and a single radio resource, comprising:

• a processor coupled to the RF module, the first and second subscriber identity cards, and executing a first protocol stack entity for the first subscriber identity card, and a second protocol stack entity for the second subscriber identity card in a multi-tasking environment,
• wherein, when executing, the first protocol stack entity forces the second protocol stack entity to release the RF module or suspend utilization of the RF module after the first protocol stack entity enters TALKING mode or enables a dial-up service, thereby enables the RF module to be utilized to perform requisite operations or procedures of the TALKING mode or the dial-up service wherein the radio resource is shared by the first and second protocol stack entities.