Join the people of your life instantly, free of charge. Messenger is like texting, except that you do not have to pay for each message (it works with your data plan).
Not just for Facebook friends: send messages to people in your phone book and simply enter a phone number to add a new contact.
Group Discussions: Create groups for the people with whom you are exchanging the most messages.
Receive notifications when people have seen your messages.
Transfer messages or photos to people who did not participate in the conversation.
Look for people and groups to contact them quickly.
Activate the location to indicate that you are nearby.
See who is available on Messenger and who is active on Facebook.
For More Info Google Play
varies with device