ims-switch                  :enable: enables the interworking
with the IMS.

disable: disables the interworking with the IMS.

inherit:
inherits the configurations related to the interworking with the IMS of the
upper-level view. It is applicable only to the APN view.

ims-signaling:
sets the dedicated IMS signaling context switch. The value can be enable or disable. The default value is disable.

signaling-radio-preference: sets the enhanced IMS signaling air interface switch . The value can
be enable or disable. The default value is disable