diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 77c12bb364121..e59c2e41a6c09 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -2459,6 +2459,10 @@ public class CarrierConfigManager {
      *
      * Note: If {@code *} is specified for the original code, any ImsReasonInfo with the matching
      * {@code MESSAGE} will be remapped to {@code NEW_CODE}.
+     * If {@code *} is specified for the message, any ImsReasonInfo with the matching
+     * {@code ORIGINAL_CODE} will be remapped to {@code NEW_CODE}.
+     * The wildcard for {@code ORIGINAL_CODE} takes precedence to the wildcard for {@code MESSAGE}.
+     * A mapping with both wildcards has no effect.
      *
      * Example: "501|call completion elsewhere|1014"
      * When the {@link ImsReasonInfo#getCode()} is {@link ImsReasonInfo#CODE_USER_TERMINATED} and