diff --git a/android-app-core/res/drawable-hdpi/kb_facebook.png b/android-app-core/res/drawable-hdpi/kb_facebook.png
deleted file mode 100644
index 6af63acf..00000000
Binary files a/android-app-core/res/drawable-hdpi/kb_facebook.png and /dev/null differ
diff --git a/android-app-core/res/drawable-ldpi/kb_facebook.png b/android-app-core/res/drawable-ldpi/kb_facebook.png
deleted file mode 100644
index bb6591ff..00000000
Binary files a/android-app-core/res/drawable-ldpi/kb_facebook.png and /dev/null differ
diff --git a/android-app-core/res/drawable-mdpi/kb_facebook.png b/android-app-core/res/drawable-mdpi/kb_facebook.png
deleted file mode 100644
index 194c8425..00000000
Binary files a/android-app-core/res/drawable-mdpi/kb_facebook.png and /dev/null differ
diff --git a/android-app-core/res/drawable-xhdpi/kb_facebook.png b/android-app-core/res/drawable-xhdpi/kb_facebook.png
deleted file mode 100644
index 8555071e..00000000
Binary files a/android-app-core/res/drawable-xhdpi/kb_facebook.png and /dev/null differ
diff --git a/android-app-core/res/drawable-xlarge-hdpi/kb_facebook.png b/android-app-core/res/drawable-xlarge-hdpi/kb_facebook.png
deleted file mode 100644
index 8555071e..00000000
Binary files a/android-app-core/res/drawable-xlarge-hdpi/kb_facebook.png and /dev/null differ
diff --git a/android-app-core/res/layout/cpp_simple_button_like.xml b/android-app-core/res/layout/cpp_simple_button_like.xml
index 235bad53..7c6ea811 100644
--- a/android-app-core/res/layout/cpp_simple_button_like.xml
+++ b/android-app-core/res/layout/cpp_simple_button_like.xml
@@ -24,6 +24,6 @@
 
 <ImageButton xmlns:a="http://schemas.android.com/apk/res/android"
 			 a:id="@id/cpp_button_like"
-			 a:src="@drawable/kb_facebook"
+			 a:src="@drawable/kb_share"
 			 style="@style/cpp_simple_metro_control_image_button_style"
 			 a:contentDescription="Like"/>
\ No newline at end of file
diff --git a/android-app-core/res/layout/cpp_simple_button_operators.xml b/android-app-core/res/layout/cpp_simple_button_operators.xml
new file mode 100644
index 00000000..ca9af29a
--- /dev/null
+++ b/android-app-core/res/layout/cpp_simple_button_operators.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+		a:id="@id/cpp_button_operators"
+		a:text="∂,…"
+		a:textStyle="italic"
+		style="@style/cpp_simple_metro_control_button_style"/>
\ No newline at end of file
diff --git a/android-app-core/res/layout/cpp_simple_keyboard.xml b/android-app-core/res/layout/cpp_simple_keyboard.xml
index f8d83c21..5ba35cc7 100644
--- a/android-app-core/res/layout/cpp_simple_keyboard.xml
+++ b/android-app-core/res/layout/cpp_simple_keyboard.xml
@@ -78,7 +78,7 @@
 
 		<include layout="@layout/cpp_simple_button_plus"/>
 
-		<include layout="@layout/cpp_simple_button_like"/>
+		<include layout="@layout/cpp_simple_button_operators"/>
 
 		<include layout="@layout/cpp_simple_button_copy"/>
 
diff --git a/android-app-core/res/values-ru/text_about.xml b/android-app-core/res/values-ru/text_about.xml
index 0e17808a..7b83d398 100644
--- a/android-app-core/res/values-ru/text_about.xml
+++ b/android-app-core/res/values-ru/text_about.xml
@@ -24,8 +24,8 @@
 
 	<string name="c_about">О программе</string>
 
-	<string name="c_about_content">Copyright (c) 2009-2011\n\n<b>Программа создана\nserso aka se.solovyev</b>\n\n
-		Сайт приложения:<a href="http://facebook.com/calculatorpp">http://facebook.com/calculatorpp</a>\n\n
+	<string name="c_about_content">Copyright (c) 2009-2013\n\n<b>Программа создана\nserso aka se.solovyev</b>\n\n
+		Сайт приложения: <a href="https://vk.com/calculatorpp">https://vk.com/calculatorpp</a>\n\n
 		Эта программа с открытыми исходным кодом:\nон может быть найден на \n
 		<a href="https://github.com/serso/android-calculatorpp">http://github.com</a>\n\n
 		За подробной информацией, пожалуйста,\nобращайтесь на почту\n<a href="mailto:se.solovyev@gmail.com">
@@ -34,13 +34,10 @@
 		Если вы хотите поддержать проект материально\nвы можете купить специальную опцию из настроек приложения\n\n
 		Если вам понравилось приложение -\nпоставьте 5 звёздочек в\n
 		<a href="https://market.android.com/details?id=org.solovyev.android.calculator">Google Play</a>\n\n
-		Спасибо тем, кто переводил Калькулятор++:\n
-		на итальянский - Gabriele Ravanetti\n
-		на испанский - Jordi Luna\n
-		на украинский - Андрій Бандура\n\n
 		Это приложение использует следующие открытые библиотеки:\n
 		<a href="http://simple.sourceforge.net">Simple (XML serialization)</a>\n
 		<a href="http://meditorworld.appspot.com/meditor.txt">JSCL</a>
 	</string>
+	<string name="cpp_share_link">https://vk.com/calculatorpp</string>
 
 </resources>
\ No newline at end of file
diff --git a/android-app-core/res/values/text_about.xml b/android-app-core/res/values/text_about.xml
index af617a64..1d082050 100644
--- a/android-app-core/res/values/text_about.xml
+++ b/android-app-core/res/values/text_about.xml
@@ -25,7 +25,7 @@
 	<string name="c_about">About</string>
 
 	<string name="c_about_content">Copyright © 2009–2013\n\n<b>Created by serso aka se.solovyev</b>\n\n
-		We are on Facebook:<a href="http://facebook.com/calculatorpp">http://facebook.com/calculatorpp</a>\n\n
+		We are on Facebook: <a href="http://facebook.com/calculatorpp">http://facebook.com/calculatorpp</a>\n\n
 		This program is distributed under Apache 2.0 License:\nsource code can be found on\n
 		<a href="https://github.com/serso/android-calculatorpp">http://github.com</a>\n\n
 		For more information please\ncontact the author by email\n
@@ -41,5 +41,6 @@
 
 	<string name="c_release_notes">Release notes</string>
 	<string name="c_release_notes_for_title">"Release notes for version "</string>
+	<string name="cpp_share_link">http://www.facebook.com/calculatorpp</string>
 
 </resources>
\ No newline at end of file
diff --git a/android-app-core/src/main/java/org/solovyev/android/calculator/CalculatorButton.java b/android-app-core/src/main/java/org/solovyev/android/calculator/CalculatorButton.java
index 6915718d..a1d84bb2 100644
--- a/android-app-core/src/main/java/org/solovyev/android/calculator/CalculatorButton.java
+++ b/android-app-core/src/main/java/org/solovyev/android/calculator/CalculatorButton.java
@@ -32,6 +32,16 @@ import org.solovyev.android.calculator.core.R;
 import java.util.HashMap;
 import java.util.Map;
 
+import static org.solovyev.android.calculator.CalculatorSpecialButton.cursor_left;
+import static org.solovyev.android.calculator.CalculatorSpecialButton.cursor_right;
+import static org.solovyev.android.calculator.CalculatorSpecialButton.functions_detached;
+import static org.solovyev.android.calculator.CalculatorSpecialButton.history_detached;
+import static org.solovyev.android.calculator.CalculatorSpecialButton.like;
+import static org.solovyev.android.calculator.CalculatorSpecialButton.open_app;
+import static org.solovyev.android.calculator.CalculatorSpecialButton.operators_detached;
+import static org.solovyev.android.calculator.CalculatorSpecialButton.settings_detached;
+import static org.solovyev.android.calculator.CalculatorSpecialButton.vars_detached;
+
 /**
  * User: serso
  * Date: 10/20/12
@@ -54,16 +64,17 @@ public enum CalculatorButton {
 	period(R.id.cpp_button_period, "."),
 	brackets(R.id.cpp_button_round_brackets, "()"),
 
-	settings(R.id.cpp_button_settings, CalculatorSpecialButton.settings_detached),
+	settings(R.id.cpp_button_settings, settings_detached),
 	like(R.id.cpp_button_like, CalculatorSpecialButton.like),
 
 	/*last row*/
-	left(R.id.cpp_button_left, CalculatorSpecialButton.cursor_left),
-	right(R.id.cpp_button_right, CalculatorSpecialButton.cursor_right),
-	vars(R.id.cpp_button_vars, CalculatorSpecialButton.vars_detached),
-	functions(R.id.cpp_button_functions, CalculatorSpecialButton.functions_detached),
-	app(R.id.cpp_button_app, CalculatorSpecialButton.open_app),
-	history(R.id.cpp_button_history, CalculatorSpecialButton.history_detached),
+	left(R.id.cpp_button_left, cursor_left),
+	right(R.id.cpp_button_right, cursor_right),
+	vars(R.id.cpp_button_vars, vars_detached),
+	functions(R.id.cpp_button_functions, functions_detached),
+	operators(R.id.cpp_button_operators, operators_detached),
+	app(R.id.cpp_button_app, open_app),
+	history(R.id.cpp_button_history, history_detached),
 
 	/*operations*/
 	multiplication(R.id.cpp_button_multiplication, "*"),
diff --git a/android-app/res/layout/cpp_app_button_donate.xml b/android-app/res/layout/cpp_app_button_donate.xml
index 213bbeff..0d0ab81e 100644
--- a/android-app/res/layout/cpp_app_button_donate.xml
+++ b/android-app/res/layout/cpp_app_button_donate.xml
@@ -24,6 +24,6 @@
 
 <ImageButton xmlns:a="http://schemas.android.com/apk/res/android"
 			 a:id="@id/cpp_button_like"
-			 a:src="@drawable/kb_facebook"
+			 a:src="@drawable/kb_share"
 			 style="?cpp_control_image_button_style"
 			 a:onClick="likeButtonClickHandler"/>
\ No newline at end of file
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityLauncher.java b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityLauncher.java
index 04442108..3ed7a4ac 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityLauncher.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorActivityLauncher.java
@@ -205,7 +205,7 @@ public final class CalculatorActivityLauncher implements CalculatorEventListener
 	}
 
 	public static void likeButtonPressed(@Nonnull final Context context) {
-		final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(CalculatorApplication.FACEBOOK_APP_URL));
+		final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(context.getString(R.string.cpp_share_link)));
 		Android.addIntentFlags(intent, false, context);
 		context.startActivity(intent);
 	}
diff --git a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorApplication.java b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorApplication.java
index f03a4dd5..be2720c7 100644
--- a/android-app/src/main/java/org/solovyev/android/calculator/CalculatorApplication.java
+++ b/android-app/src/main/java/org/solovyev/android/calculator/CalculatorApplication.java
@@ -72,7 +72,6 @@ public class CalculatorApplication extends android.app.Application implements Sh
 	*/
 
 	private static final String TAG = "Calculator++ Application";
-	public static final String FACEBOOK_APP_URL = "http://www.facebook.com/calculatorpp";
 
 	public static final String AD_FREE_PRODUCT_ID = "ad_free";
 	public static final String AD_FREE_P_KEY = "org.solovyev.android.calculator_ad_free";