diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index c9dcd8b0dd2af..ba5c6e73680ab 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -322,7 +322,9 @@ public class TelephonyManager {
     /**
      * Returns the alphabetic name of current registered operator.
      * <p>
-     * Availability: Only when user is registered to a network
+     * Availability: Only when user is registered to a network. Result may be
+     * unreliable on CDMA networks (use {@link #getPhoneType()} to determine if
+     * on a CDMA network).
      */
     public String getNetworkOperatorName() {
         return SystemProperties.get(TelephonyProperties.PROPERTY_OPERATOR_ALPHA);
@@ -331,7 +333,9 @@ public class TelephonyManager {
     /**
      * Returns the numeric name (MCC+MNC) of current registered operator.
      * <p>
-     * Availability: Only when user is registered to a network
+     * Availability: Only when user is registered to a network. Result may be
+     * unreliable on CDMA networks (use {@link #getPhoneType()} to determine if
+     * on a CDMA network).
      */
     public String getNetworkOperator() {
         return SystemProperties.get(TelephonyProperties.PROPERTY_OPERATOR_NUMERIC);
@@ -341,7 +345,7 @@ public class TelephonyManager {
      * Returns true if the device is considered roaming on the current
      * network, for GSM purposes.
      * <p>
-     * Availability: Only when user registered to a network
+     * Availability: Only when user registered to a network.
      */
     public boolean isNetworkRoaming() {
         return "true".equals(SystemProperties.get(TelephonyProperties.PROPERTY_OPERATOR_ISROAMING));
@@ -351,7 +355,9 @@ public class TelephonyManager {
      * Returns the ISO country code equivilent of the current registered
      * operator's MCC (Mobile Country Code).
      * <p>
-     * Availability: Only when user is registered to a network
+     * Availability: Only when user is registered to a network. Result may be
+     * unreliable on CDMA networks (use {@link #getPhoneType()} to determine if
+     * on a CDMA network).
      */
     public String getNetworkCountryIso() {
         return SystemProperties.get(TelephonyProperties.PROPERTY_OPERATOR_ISO_COUNTRY);
diff --git a/telephony/java/com/android/internal/telephony/TelephonyProperties.java b/telephony/java/com/android/internal/telephony/TelephonyProperties.java
index 290e1fc24b71f..5ec4020d6fdc1 100644
--- a/telephony/java/com/android/internal/telephony/TelephonyProperties.java
+++ b/telephony/java/com/android/internal/telephony/TelephonyProperties.java
@@ -40,14 +40,16 @@ public interface TelephonyProperties
 
     //****** Current Network
 
-    /** Alpha name of current registered operator.
-     *  Availability: when registered to a network
+    /** Alpha name of current registered operator.<p>
+     *  Availability: when registered to a network. Result may be unreliable on
+     *  CDMA networks.
      */
     static final String PROPERTY_OPERATOR_ALPHA = "gsm.operator.alpha";
     //TODO: most of these proprieties are generic, substitute gsm. with phone. bug 1856959
 
-    /** Numeric name (MCC+MNC) of current registered operator.
-     *  Availability: when registered to a network
+    /** Numeric name (MCC+MNC) of current registered operator.<p>
+     *  Availability: when registered to a network. Result may be unreliable on
+     *  CDMA networks.
      */
     static final String PROPERTY_OPERATOR_NUMERIC = "gsm.operator.numeric";
 
@@ -64,8 +66,9 @@ public interface TelephonyProperties
     static final String PROPERTY_OPERATOR_ISROAMING = "gsm.operator.isroaming";
 
     /** The ISO country code equivalent of the current registered operator's
-     *  MCC (Mobile Country Code)
-     *  Availability: when registered to a network
+     *  MCC (Mobile Country Code)<p>
+     *  Availability: when registered to a network. Result may be unreliable on
+     *  CDMA networks.
      */
     static final String PROPERTY_OPERATOR_ISO_COUNTRY = "gsm.operator.iso-country";