Obtains the IMS registration status of the specified IMS service type for the SIM card in the specified slot. This API uses an asynchronous callback to return the result.
Obtains the IMS registration status of the specified IMS service type for the SIM card in the specified slot. This API uses a promise to return the result.
Enables listening for **imsRegStateChange** events for the SIM card in the specified slot. This API uses an asynchronous callback to return the result.
Disables listening for **imsRegStateChange** events for the SIM card in the specified slot. This API uses an asynchronous callback to return the result.
Obtains the international mobile subscriber identity (IMSI) of the SIM card in the specified slot. This API uses an asynchronous callback to return the result.