diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GameConfigDelegate.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GameConfigDelegate.java
index 058c8a624..a720b1223 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GameConfigDelegate.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/GameConfigDelegate.java
@@ -111,6 +111,7 @@ public class GameConfigDelegate extends DelegateBase
     private CommonPrefs m_cp;
     private boolean m_gameStarted = false;
     private String[] m_connStrings;
+    private boolean m_nameWarningShown = false;
     private HashMap<CommsConnType, boolean[]> m_disabMap;
     private static final int[] s_disabledWhenLocked
         = { R.id.juggle_players,
@@ -520,6 +521,8 @@ public class GameConfigDelegate extends DelegateBase
             .getSpinner();
 
         m_connLabel = (TextView)findViewById( R.id.conns_label );
+
+        findViewById( R.id.room_edit ).setOnClickListener(this);
     } // init
 
     @Override
@@ -859,6 +862,14 @@ public class GameConfigDelegate extends DelegateBase
                     saveAndClose( false );
                 }
                 break;
+            case R.id.room_edit:
+                if ( ! m_nameWarningShown ) {
+                    m_nameWarningShown = true;
+                    makeNotAgainBuilder( R.string.not_again_warnRoomName,
+                                         R.string.key_na_warnRoomName )
+                        .show();
+                }
+                break;
             default:
                 Log.w( TAG, "unknown v: " + view.toString() );
                 Assert.failDbg();
diff --git a/xwords4/android/app/src/main/res/values/common_rsrc.xml b/xwords4/android/app/src/main/res/values/common_rsrc.xml
index 334022848..4be3efe0d 100644
--- a/xwords4/android/app/src/main/res/values/common_rsrc.xml
+++ b/xwords4/android/app/src/main/res/values/common_rsrc.xml
@@ -159,6 +159,7 @@
 
   <string name="key_na_dupstatus_host">key_na_dupstatus_host</string>
   <string name="key_na_dupstatus_guest">key_na_dupstatus_guest</string>
+  <string name="key_na_warnRoomName">key_na_warnRoomName</string>
 
   <!-- Nor is my email address -->
   <string name="email_author_email">xwords@eehouse.org</string>
diff --git a/xwords4/android/app/src/main/res/values/strings.xml b/xwords4/android/app/src/main/res/values/strings.xml
index a90210785..c4e9578c9 100644
--- a/xwords4/android/app/src/main/res/values/strings.xml
+++ b/xwords4/android/app/src/main/res/values/strings.xml
@@ -1394,7 +1394,25 @@
     <string name="not_again_unlock">This game is in play. Some
       settings, e.g. the number of players, cannot be changed without
       restarting it.  When you leave this page you will have a chance
-      to discard changes to avoid a restart.</string>
+    to discard changes to avoid a restart.</string>
+    <!-- shown in the game configure screen the first time user taps
+         on the room name edit field. -->
+    <string name="not_again_warnRoomName">
+      Changing the room name? If you’re doing that to connect to an
+      existing game you should know that there’s a better way: have
+      the person who created the game send you an invitation. (She
+      will be prompted to send an invitation whenever she opens a game
+      that’s missing any players.)
+
+      \n\nIf you just want to have a cool room name, no problem!
+
+      \n\nAnd, if you still want to connect by setting room names
+      manually, try to keep the games open on both devices until you
+      see tiles appear.
+
+      \n\n(I am working on fixing this...)
+    </string>
+
     <!-- This is shown in the Board screen when you successfully
          connect a game to the relay and are the first device in the
          game to do so. -->