Free Calls with Facebook Messenger on Android

Facebook just released version 4.0 of their communications app Facebook Messenger for Android. One of the updates included in version 4.0 is free calls.
Now a blue phone icon appears in the top right corner of the chat window. Click on it to call the contacts you’re talking to. The calls are free over Wi-Fi, otherwise standard data rates apply. You can use Facebook Messenger on Android to make free calls to anyone else who is on the app regardless of where they are in the world.

Version 4.0 also introduces the ability to create Groups and name them, and set group photos to keep in touch with the people you message most. You can now also forward text messages and photo messages from within conversations by pressing on them.
Finally, the new app brings with it Conversation Shortcuts, which allows you to talk with your contacts right on your homescreen. To do this, tap the menu button and select Create Shortcut.
Download the update through the Google Play Store and enjoy free calls to anywhere in the world!