Performing data communication using a first RAT while performing a voice call using a second RAT

A user equipment device (UE), comprising:

• a first radio, wherein the first radio comprises one or more receive chains, where the one or more receive chains operate on the same frequency, and wherein the first radio is configured to perform communication using a first radio access technology (RAT) and a second RAT and maintain a connection to both the first RAT and the second RAT concurrently;
• a smart card, wherein the smart card is configured to implement subscriber identity module (SIM) functionality for both the first RAT and the second RAT;
• and
• one or more processors coupled to the first radio, wherein the one or more processors and the first radio are configured to:
• perform first data communication using the first RAT, wherein the first RAT comprises long term evolution (LTE);
• receive an indication to perform at least one of a mobile originated voice call or receive a mobile terminated voice call using the second RAT;
• perform the voice call using the second RAT in response to the indication;
• perform second data communication using the first RAT during performing the voice call, wherein the second data communication involves transmission and reception using the first radio, and wherein the one or more receive chains time multiplex among the first and second RATs;
• wherein, based on the UE performing the second data communication during the voice call, the UE is configured to perform the voice call using the second RAT using fewer frames at an increased power, and wherein performing the voice call using fewer frames at the increased power allows the UE to use an additional frame of the second RAT for performing the second data communication.

A non-transitory, computer accessible memory medium storing program instructions for performing handover by a user equipment device (UE), wherein the UE comprises a first radio for communicating using a first radio access technology (RAT) and a second RAT, wherein the first radio comprises one or more receive chains, where the one or more receive chains operate on the same frequency, and wherein the program instructions are executable by a processor to:

• perform, using the first radio, first data communication using the first RAT, wherein the first RAT comprises long term evolution (LTE);
• receiving an indication of a voice call for the second RAT;
• perform, using the first radio, the voice call using the second RAT in response to the indication;
• and
• perform, using the first radio, second data communication using the first RAT during said performing the voice call, wherein the second data communication involves transmission and reception using the first radio, and wherein the one or more receive chains time multiplex among the first and second RATs;
• wherein, based on the UE performing the second data communication during the voice call, the UE is configured to perform the voice call using the second RAT using fewer frames at an increased power, and wherein performing the voice call using fewer frames at the increased power allows the UE to use an additional frame of the second RAT for performing the second data communication.