In dual-SIM dual-standby mobile devices, two protocol stacks share one radio transceiver. Thus, only one SIM can task the radio transceiver at a time, with voice calls having priority over data calls. On such devices, a default data SIM is identified and the other SIM is a voice SIM by default. When using the voice SIM to make a voice call, the radio transceiver is tasked by the voice SIM, and data services, being provided by the other SIM, are suspended. It is advantageous to continue data services in parallel to the voice call. This disclosure describes techniques that enable the user to selectively enable data on the voice SIM, such that during a voice call, selected, high-priority data connections continue uninterrupted.
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Greenwalt, Robert; Sasindran, Sooraj; Sampath, Balaji; Chen, Xiangyu; and Nayak, Shivank, "Selective data access in dual-SIM dual-standby devices", Technical Disclosure Commons, (May 31, 2019)