diff --git a/app/src/main/java/org/linphone/utils/FileUtils.java b/app/src/main/java/org/linphone/utils/FileUtils.java
index 68d42ef9e..7249b2cab 100644
--- a/app/src/main/java/org/linphone/utils/FileUtils.java
+++ b/app/src/main/java/org/linphone/utils/FileUtils.java
@@ -1,5 +1,24 @@
 package org.linphone.utils;
 
+/*
+FileUtils.java
+Copyright (C) 2018  Belledonne Communications, Grenoble, France
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+
 import android.content.Context;
 import android.database.Cursor;
 import android.net.Uri;
diff --git a/app/src/main/java/org/linphone/utils/ImageUtils.java b/app/src/main/java/org/linphone/utils/ImageUtils.java
index 169da962f..f852365ab 100644
--- a/app/src/main/java/org/linphone/utils/ImageUtils.java
+++ b/app/src/main/java/org/linphone/utils/ImageUtils.java
@@ -1,5 +1,24 @@
 package org.linphone.utils;
 
+/*
+ImageUtils.java
+Copyright (C) 2018  Belledonne Communications, Grenoble, France
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
diff --git a/app/src/main/java/org/linphone/utils/LinphoneUtils.java b/app/src/main/java/org/linphone/utils/LinphoneUtils.java
index 94c30b694..5740b2f05 100644
--- a/app/src/main/java/org/linphone/utils/LinphoneUtils.java
+++ b/app/src/main/java/org/linphone/utils/LinphoneUtils.java
@@ -42,17 +42,12 @@ import android.widget.TextView;
 import org.linphone.LinphoneManager;
 import org.linphone.LinphoneService;
 import org.linphone.R;
-import org.linphone.contacts.ContactsManager;
 import org.linphone.core.AccountCreator;
 import org.linphone.core.Address;
 import org.linphone.core.Call;
 import org.linphone.core.Call.State;
-import org.linphone.core.ChatMessage;
-import org.linphone.core.Content;
 import org.linphone.core.Core;
 import org.linphone.core.Factory;
-import org.linphone.core.Friend;
-import org.linphone.core.FriendList;
 import org.linphone.core.LogCollectionState;
 import org.linphone.core.LogLevel;
 import org.linphone.core.LoggingService;