diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index faa5deed0f1c6..962200b82a81b 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -15454,7 +15454,9 @@ public class TelephonyManager {
     public static final int PREPARE_UNATTENDED_REBOOT_PIN_REQUIRED = 1;
 
     /**
-     * The unattended reboot was not prepared due to generic error.
+     * The unattended reboot was not prepared due to a non-recoverable error. After this error,
+     * the client that manages the unattended reboot should not try to invoke the API again
+     * until the next power cycle.
      * @hide
      */
     @SystemApi