diff --git a/Docs/Integration.md b/Docs/Integration.md
index ff3cf19..39c6ba6 100644
--- a/Docs/Integration.md
+++ b/Docs/Integration.md
@@ -36,3 +36,10 @@ With the `Share` feature selected, start
 `AndroidFacebookInterop.ExtraShareImagePath`. Read `ExtraStatus` and
 `ExtraErrorCode` from the activity result. The wrapper uses `SharePhotoContent`
 and never injects a message.
+
+The wrapper records the ShareDialog mode availability in Android logs. When no
+supported dialog mode is available, `ExtraStatus` is `failed` and
+`ExtraErrorCode` reports
+`share_dialog_unavailable_native_<0|1>_web_<0|1>`. Consumers may use that
+diagnostic to offer an explicit Android image-intent fallback. The wrapper does
+not silently change transport.
diff --git a/src/Kapusch.FacebookApisForAndroidComponents/Native/Android/facebookinterop/src/main/java/com/kapusch/facebook/androidinterop/FacebookShareActivity.java b/src/Kapusch.FacebookApisForAndroidComponents/Native/Android/facebookinterop/src/main/java/com/kapusch/facebook/androidinterop/FacebookShareActivity.java
index aefdc27..fa1e0d6 100644
--- a/src/Kapusch.FacebookApisForAndroidComponents/Native/Android/facebookinterop/src/main/java/com/kapusch/facebook/androidinterop/FacebookShareActivity.java
+++ b/src/Kapusch.FacebookApisForAndroidComponents/Native/Android/facebookinterop/src/main/java/com/kapusch/facebook/androidinterop/FacebookShareActivity.java
@@ -5,16 +5,20 @@
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.os.Bundle;
+import android.util.Log;
 
+import com.facebook.AccessToken;
 import com.facebook.CallbackManager;
 import com.facebook.FacebookCallback;
 import com.facebook.FacebookException;
+import com.facebook.FacebookSdk;
 import com.facebook.share.Sharer;
 import com.facebook.share.model.SharePhoto;
 import com.facebook.share.model.SharePhotoContent;
 import com.facebook.share.widget.ShareDialog;
 
 public final class FacebookShareActivity extends Activity {
+	private static final String LOG_TAG = "KapuschFacebookShare";
 	private CallbackManager callbackManager;
 	private Bitmap bitmap;
 
@@ -55,8 +59,31 @@ public void onError(FacebookException error) {
 
 		SharePhoto photo = new SharePhoto.Builder().setBitmap(bitmap).build();
 		SharePhotoContent content = new SharePhotoContent.Builder().addPhoto(photo).build();
-		if (!dialog.canShow(content, ShareDialog.Mode.AUTOMATIC)) {
-			completeFailed("share_dialog_unavailable");
+		boolean automaticAvailable = dialog.canShow(content, ShareDialog.Mode.AUTOMATIC);
+		boolean nativeAvailable = dialog.canShow(content, ShareDialog.Mode.NATIVE);
+		boolean webAvailable = dialog.canShow(content, ShareDialog.Mode.WEB);
+		boolean feedAvailable = dialog.canShow(content, ShareDialog.Mode.FEED);
+		boolean nativePhotoCapabilityAvailable = ShareDialog.canShow(SharePhotoContent.class);
+		boolean accessTokenActive = AccessToken.isCurrentAccessTokenActive();
+
+		Log.i(
+			LOG_TAG,
+			"ShareDialog availability"
+				+ " sdkInitialized=" + FacebookSdk.isInitialized()
+				+ " accessTokenActive=" + accessTokenActive
+				+ " automatic=" + automaticAvailable
+				+ " native=" + nativeAvailable
+				+ " nativePhotoCapability=" + nativePhotoCapabilityAvailable
+				+ " web=" + webAvailable
+				+ " feed=" + feedAvailable
+		);
+
+		if (!automaticAvailable) {
+			completeFailed(
+				"share_dialog_unavailable"
+					+ "_native_" + availabilityFlag(nativeAvailable)
+					+ "_web_" + availabilityFlag(webAvailable)
+			);
 			return;
 		}
 		dialog.show(content, ShareDialog.Mode.AUTOMATIC);
@@ -70,6 +97,10 @@ protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 		}
 	}
 
+	private static String availabilityFlag(boolean available) {
+		return available ? "1" : "0";
+	}
+
 	private void completeFailed(String errorCode) {
 		complete("failed", RESULT_OK, errorCode);
 	}
diff --git a/src/Kapusch.FacebookApisForAndroidComponents/nuget-readme.md b/src/Kapusch.FacebookApisForAndroidComponents/nuget-readme.md
index d4f83c9..7c9eb6c 100644
--- a/src/Kapusch.FacebookApisForAndroidComponents/nuget-readme.md
+++ b/src/Kapusch.FacebookApisForAndroidComponents/nuget-readme.md
@@ -7,3 +7,6 @@ Set `KapuschFacebookFeatures` to `Login` (default), `Share`, or `Login;Share`.
 ## Notes
 - No secrets are included.
 - You must configure your AndroidManifest / resources as required by the Facebook Android SDK.
+- Photo sharing reports native and web ShareDialog availability through a
+  stable `share_dialog_unavailable_native_<0|1>_web_<0|1>` error code when the
+  SDK cannot open a supported composer.