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The SIM toolkit UI application can also play tones and launch the browser.

Microsoft does not localize these text strings. Text strings that are displayed as part of the message interaction with the SIM are provided by the mobile operator. Microsoft localizes these strings into the languages supported by Windows. The SIM toolkit UI application displays two types of text strings:Īpplication management strings are part of the SIM toolkit UI. The SIM toolkit UI displays text as directed by the SIM toolkit service. It runs as a background task, and serves as a command interpreter between the SIM and the SIM toolkit UI application. The SIM toolkit service is part of the Windows 10 Mobile OS. The following diagram illustrates the main components of SIM toolkit.

The modem and the radio interface layer (RIL) software provided by the silicon vendor.īoth the SIM toolkit service and user interface are provided by Microsoft. The three main components of SIM toolkit are: For a list of the supported commands, see SIM toolkit commands. Windows 10 Mobile supports a subset of the SIM toolkit commands.

SIM toolkit applications are represented by proactive commands that are defined by 3GPP and ETSI specifications. SIM toolkit is a set of applications on the SIM that can be activated by network events or user actions.