Methods to prioritize mobile originated emergency calls over existing mobile terminated call related signaling on other subscription

A mobile communication device, comprising:

• a communication unit including a radio frequency (RF) chain;
• a memory operably connected to the communication unit;
• and
• a control unit operably connected to the communication unit and the memory and configured to:
• control the communication unit to initiate an emergency call on a first subscription;
• determine whether a mobile terminated (MT) call is incoming on a second subscription;
• in response to determining that the MT call is incoming on the second subscription, control the communication unit to abort MT call signaling;
• determine whether the first subscription is out of service;
• and
• in response to determining that the first subscription is not out of service, control the communication unit to complete the emergency call on the first subscription.

A mobile communication device, comprising:

• a radio frequency (RF) chain configured to support a first radio access technology (RAT) and a second RAT;
• and
• a control unit operatively coupled to the RF chain;
• and
• a memory operatively coupled to the control unit and the RF chain,
• wherein the control unit is configured to:
• trigger a circuit-switched fallback (CSFB) on a first subscription from the first RAT to the second RAT to establish a CS voice call;
• and
• lock the RF chain for use by the first subscription until the CS voice call is established on the second RAT.