System, apparatus, and method for controlling access to multiple antennas in mobile devices having multiple SIMs

A mobile device, comprising:

• at least a first antenna and a second antenna;
• a first pair of receive radio frequency (RF) chains, comprising a first receive RF chain and a second receive RF chain;
• a second pair of receive RF chains, comprising a third receive RF chain and a fourth receive RF chain;
• a transmit RF chain;
• a switch having at least a first position and a second position, wherein the position of the switch controls coupling between the first pair of receive RF chains, the second pair of receive RF chains, the first antenna, and the second antenna;
• a first subscriber identity module (SIM), wherein a first protocol stack is associated with the first SIM;
• a second SIM, wherein a second protocol stack is associated with the second SIM;
• a processing element coupled to the at least the first antenna and the second antenna, the first and second pairs of receive RF chains, the transmit RF chain, the switch, the first SIM, and the second SIM, wherein the processing element are configured to:
• determine a type of communication associated with the first protocol stack and the second protocol stack;
• and
• based on the determined type of communication, during a first period of time, allow the first protocol stack to modify the position of the switch while preventing the second protocol stack from modifying the position of the switch.