Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may detect that a first subscription, of a plurality of subscriptions associated with the UE, is associated with an active service on a first cellular network. The UE may search, for a second subscription of the plurality of subscriptions, for radio access technologies (RATs) and frequency bands that are compatible with a dual active mode of the UE. In some aspects, the UE may detect that the active service on the first cellular network has ended. Accordingly, the UE may search, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE and for RATs and frequency bands that are incompatible with the dual active mode, before expiry of a timer associated with a power saving state. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a mobile station may detect that a voltage fails to satisfy a performance threshold while operating in a dual subscriber identity module (SIM)-dual active (DSDA) mode associated with maintaining a first network connection in a first active mode concurrently with maintaining a second network connection in a second active mode. The mobile station may transition the first network connection from the first active mode to a standby mode based at least in part on detecting that the voltage fails to satisfy the performance threshold. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may detect that a first subscription, of a plurality of subscriptions associated with the UE, is associated with an active service on a first cellular network. The UE may search, for a second subscription of the plurality of subscriptions, for radio access technologies (RATs) and frequency bands that are compatible with a dual active mode of the UE. In some aspects, the UE may detect that the active service on the first cellular network has ended. Accordingly, the UE may search, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE and for RATs and frequency bands that are incompatible with the dual active mode, before expiry of a timer associated with a power saving state. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may establish, using a first subscription of the UE, a first communication connection associated with a first service. The UE may establish, using a second subscription of the UE, a second communication connection associated with a second service. The UE may operate in a dual subscriber identity module (SIM) dual active (DSDA) mode based at least in part on establishing the first communication connection and establishing the second communication connection. The UE may perform an action to maintain concurrent services, including the first service and the second service, while operating in the DSDA mode. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may configure a first channel associated with a first subscriber identity module (SIM), the first SIM associated with data traffic. The UE may configure a second channel associated with a second SIM in a dual SIM dual active (DSDA) mode. The UE may detect, on the second channel, a subscription related data stream that includes voice call traffic. The UE may determine, based on detecting the subscription related data stream, to switch the data traffic from the first SIM to the second SIM based at least in part on a UE operation mode. The UE may switch the data traffic from the first SIM to the second SIM based at least in part on the determination to switch the data traffic. Numerous other aspects are described.

Abstract: Certain aspects of the present disclosure provide techniques for using a message to update a user equipment (UE) radio capability. For example a method of wireless communication by a user equipment (UE) may include generating a tracking area update (TAU) message with an indication of a UE radio capability update, transmitting the TAU message, and detaching and reattaching the UE from a network if a UE capability inquiry is not received from the network or a capability mismatch between the UE and the network is detected.

Abstract: A method for call setup for a voice-over-long-term evolution (VoLTE) call on multi-subscriber identity module (SIM) multi-standby (MSMS) mobile communication device includes: receiving a long-term evolution (LTE) page; determining whether a WiFi connection is available; in response to determining that the WiFi connection is not available, determining whether the LTE page was received on a non-dedicated data subscription (DDS) subscription; and in response to determining that the LTE page was received on the non-DDS subscription, granting a highest priority for communication activities to an LTE page response on the non-DDS subscription.

Abstract: A method for call setup for a voice-over-long-term evolution (VoLTE) call on multi-subscriber identity module (SIM) multi-standby (MSMS) mobile communication device includes: receiving a long-term evolution (LTE) page; determining whether a WiFi connection is available; in response to determining that the WiFi connection is not available, determining whether the LTE page was received on a non-dedicated data subscription (DDS) subscription; and in response to determining that the LTE page was received on the non-DDS subscription, granting a highest priority for communication activities to an LTE page response on the non-DDS subscription.

Abstract: Various methods for managing packet switched (PS) states on a mobile communication device may include performing, on a first subscription on the mobile communication device, a transition from a first radio access technology (RAT) to a second RAT, determining whether at least one application on the mobile communication device is utilizing on-demand PS services on the first subscription, and registering for circuit switched (CS) services but not PS services on the second RAT in response to determining that no applications on the mobile communication device is utilizing on-demand PS services on the first subscription.

Abstract: Various methods for performing public land mobile network (PLMN) searches on a mobile communication device may include obtaining information about one or more radio access technologies (RATs) for which network coverage is allowed by a network operator of a home PLMN (HPLMN) of the mobile communication device, selecting one of the one or more allowed RATs, conducting a PLMN search on the selected RAT, and determining whether there are available PLMNs on the selected RAT based on the PLMN search. In some examples, the information about one or more RATs for which network coverage is allowed by the network operator may be stored in a universal subscriber identity module (USIM) on the mobile communication device. In such example, the information may be stored in one or more PLMN selector lists on the USIM.

Abstract: A method for optimizing remote authentication of a virtual subscriber identity module (VSIM) for a multi-subscriber identity module (SIM) multi-standby (MSMS) mobile communication device includes: receiving a VSIM authentication request from a VSIM network; determining whether a previous packet switched (PS) connection between the VSIM and the VSIM network is available; in response to determining that the previous PS connection between the VSIM and the VSIM network is available, performing VSIM authentication using the previous PS connection between the VSIM and the VSIM network.

Abstract: A method for prioritizing a mobile originated emergency call over mobile terminated call signaling, includes: initiating an emergency call on a first subscription; determining 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, aborting the MT call signaling; determining whether the first subscription is out of service; and in response to determining that the first subscription is not out of service completing the emergency call on the first subscription.

Abstract: A method for performing data service switch for a mobile communication device having a first subscription configured as a dedicated data subscription (DDS) and a second subscription includes: receiving a multimedia messaging service (MMS) message notification on the second subscription; calculating an approximate transfer time for receiving the MMS message; determining the that the approximate transfer time is less than a specified time; in response to determining that the approximate transfer time is less than the specified time, performing at the mobile communication device a local packet switched (PS) service detach procedure for the first subscription; performing a circuit switched (CS) service attach procedure for the first subscription; and performing a PS service attach procedure for the second subscription.

Abstract: Methods and apparatus are provided for device configuration (e.g., feature segment loading and system selection). Certain aspects of the present disclosure generally relate to operating a user equipment (UE) in a first radio access network (RAN) with a first set of modem features that supports the first RAN, detecting a second RAN not supported by the first set of modem features, and rebooting the modem software to load a second set of modem features that supports the detected RAN. For certain aspects, the first RAN may be a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) network and the second RAN may be a Wideband-Code Division Multiple Access (W-CDMA) network or long term evolution network. This allows features to be loaded into memory (e.g., only) when they are required to support a detected RAN, rather than loading an entire image, thereby conserving DRAM and increasing efficiency.

Abstract: Various embodiments include methods implemented on a mobile communication device for acquiring service when the mobile communication device has a first subscription and a second subscription that belong to the same network operator. The methods may include receiving a first equivalent public land mobile network (EPLMN) database associated with the first subscription, determining whether a second EPLMN database associated with the second subscription is the same as the first EPLMN database, and modifying the second EPLMN database based on the first EPLMN database in response to determining that the second EPLMN database associated with the second subscription is not the same as the first EPLMN database.

Abstract: The present disclosure presents a method and an apparatus for an improved acquisition mechanism at a user equipment (UE). For example, the disclosure presents a method for identifying a plurality of frequencies for camping by the UE, wherein each frequency of the plurality of frequencies is associated with a radio access technology (RAT), sorting the identified frequencies into one or more frequency groups based on a priority associated with each of the identified frequencies, searching a frequency group with a first highest priority to detect a cell for camping by the UE, and camping on a cell detected by the UE. As such, a method and an apparatus for an improved acquisition mechanism at a user equipment (UE) is disclosed.

Abstract: Methods and apparatus are provided for device configuration (e.g., feature segment loading and system selection). Certain aspects of the present disclosure generally relate to operating a user equipment (UE) in a first radio access network (RAN) with a first set of modem features that supports the first RAN, detecting a second RAN not supported by the first set of modem features, and rebooting the modem software to load a second set of modem features that supports the detected RAN. For certain aspects, the first RAN may be a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) network and the second RAN may be a Wideband-Code Division Multiple Access (W-CDMA) network or Long-Term Evolution (LTE) network. This allows features to be loaded into memory (e.g., only) when they are required to support a detected RAN, rather than loading an entire image, thereby conserving DRAM and increasing efficiency.

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for improving call setup performance. In certain aspects, a User Equipment (UE) or a network servicing the UE, may detect at least one of the occurrence or anticipated occurrence of circuit switched (CS) signaling by a user equipment (UE), wherein the CS signaling at least comprises signaling associated with a CS call setup procedure, suspend packet-switched (PS) signaling or processing of such PS signaling in order to avoid delaying circuit-switched (CS) signaling, at least until the PS signaling may not substantially effect CS domain activity. In an aspect, a progress of a CS call setup procedure may be monitored and the PS signaling or processing of such PS signaling may be resumed based on completion of a radio bearer setup step in the CS call setup procedure.

Abstract: A mobile communication device includes a domain selection feature that allows a user to select a domain preference such as a circuit switched (CS) voice domain preference, a packet switched (PS) data domain preference, or a (CS+PS) domain preference. The mobile device receives Public Land Mobile Network (PLMN) ID and domain availability information from one or more PLMNs. A PLMN priority list is generated on the basis of the received PLMN information and the user domain preference selection. PLMNs having the user selected service available are assigned a higher priority than those that don't currently have the service, whereby an original PLMN list may be updated. Thereby, the mobile device is more likely to obtain the desired service without resorting to a time consuming manual selection process.

Abstract: In an embodiment, a wireless communications device (WCD) is provisioned with a plurality of subscriber identity modules (SIMs). The WCD determines a first set of bands (BAND1) that is associated with a first SIM and a second set of bands (BAND2) associated with a second SIM. In a first embodiment, the WCD generates a combined band for the first and second SIMs and then scans the combined band to detect a set of target networks for camping in association with at least the first and second SIMs. In a second embodiment, the WCD scans BAND1 to detect a first set of target networks for camping in association with the first SIM, and then excludes, from the BAND2, bands that overlap with BAND1. The WCD then scans the reduced BAND2 to detect to detect a second set of target networks for camping in association with the second SIM.