Samsung Galaxy S III User Manual page 130

Tap Recipients

You can also select contact groups as recipients. When you have selected all the message
recipients, tap Done.
4. Tap the Enter message field and then start composing your message.
Note: A counter appears below the Send button
and how many characters are left. Once you go over the 160-character limit, a new message is created
but automatically joined into one when received.
5. When done, tap Send
Messaging and Internet
, and then select the contacts to whom you want to send the message.
to tell you how many characters you have entered
to send the text message.
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