Use Talk in your Galaxy S4 to chat with others via Google Talk.
Tap Talk on the Applications screen to start.
This application may not be available depending on the region or service provider.
Tap the account ID at the top of the friends list to change the availability status, image, or status message.
Tap , enter the email address of the friend to add, and then tap DONE.
Chatting with friends
Select a friend from the friends list, enter a message in the field at the bottom of the screen, and then tap .
To add a friend to chat, tap → Add to chat.
To end the chat, tap → End chat.
Switching between chats
Scroll left or right.
Deleting chat history
Chats are automatically saved. To delete chat history, tap → Clear chat history.