diff --git a/radio/1.4/IRadio.hal b/radio/1.4/IRadio.hal
index 8854453..11a45f2 100644
--- a/radio/1.4/IRadio.hal
+++ b/radio/1.4/IRadio.hal
@@ -105,6 +105,11 @@
      * Note this API is the same as IRadio.dial except using the
      * @1.4::EmergencyServiceCategory as the input param.
      *
+     * If the number in the 'dialInfo' field is identified as an emergency number in Android,
+     * Android use this request for its emergency call instead of @1.0::IRadio.dial. The
+     * implementation decides how to handle the call (e.g. emergency routing or normal
+     * routing).
+     *
      * If the dialed emergency number does not have a specified emergency service category, the
      * 'categories' field is set to @1.4::EmergencyServiceCategory#UNSPECIFIED; iff either the
      * 'categories' field is set to @1.4::EmergencyServiceCategory#UNSPECIFIED or the underlying
diff --git a/radio/1.4/types.hal b/radio/1.4/types.hal
index 4e5b288..601e020 100644
--- a/radio/1.4/types.hal
+++ b/radio/1.4/types.hal
@@ -52,11 +52,14 @@
  * Emergency number contains information of number, one or more service category(s), mobile country
  * code (mcc), and source(s) that indicate where it comes from.
  *
- * If the source of the emergency number is associated with country, field ‘mcc’ must be
- * provided; otherwise the field ‘mcc’ must be an empty string.
+ * If the source of the emergency number is associated with country, field ‘mcc’ must be provided;
+ * otherwise the field ‘mcc’ must be an empty string.
  *
- * A unique EmergencyNumber has a unique combination of ‘number’, ‘mcc’ and 'categories' fields.
- * Multiple @1.4::EmergencyNumberSource should be merged into the bitfield for the same
+ * If the source of the emergency number is associated with network operator, field ‘mcc’ and
+ * 'mnc' must be provided; otherwise the field ‘mnc’ must be an empty string.
+ *
+ * A unique EmergencyNumber has a unique combination of ‘number’, ‘mcc’, 'mnc' and 'categories'
+ * fields. Multiple @1.4::EmergencyNumberSource should be merged into the bitfield for the same
  * EmergencyNumber.
  *
  * Reference: 3GPP TS 22.101 version 9.1.0 Release 9
@@ -72,6 +75,10 @@
      */
     string mcc;
     /**
+     * 2 or 3-digit Mobile Network Code, 0..999. Empty string if not applicable.
+     */
+    string mnc;
+    /**
      * The bitfield of @1.4::EmergencyServiceCategory(s). See @1.4::EmergencyServiceCategory for
      * the value of each bit.
      */