Apparatus, methods, and systems for connection suspension of a SIM are disclosed. An apparatus 600 includes a processor 605, a first SIM 645 registered with a first mobile communication network, a second SIM 650 registered with a second mobile communication network, and a transceiver 625 in communication with the first and second mobile communication networks. The processor 605 receives 815 a communication trigger associated with the first SIM 645, the communication trigger indicating a service type, and determines 820 whether to apply short connection suspension or long connection suspension to the second SIM 650, the determination based on the service type. The processor 605 additionally applies 825 a selected one of short connection suspension and long connection suspension to the second SIM 650.