diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 8bd8625..7e6e8f4 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -11125,6 +11125,8 @@
      * The {@link #EXTRA_NETWORK_COUNTRY} extra indicates the country code of the current
      * network returned by {@link #getNetworkCountryIso()}.
      *
+     * <p>There may be a delay of several minutes before reporting that no country is detected.
+     *
      * @see #EXTRA_NETWORK_COUNTRY
      * @see #getNetworkCountryIso()
      */