AT&T Calypso User Manual page 83

Note: Messages exceeding a limited amount of characters will be delivered
as one message but may incur additional charges . A counter appears
below Send
to tell you how many characters you have entered and how
many characters are left .
5 . When done, tap Send
to send the text message .
Note: Your text message automatically becomes a multimedia message if
you enter an email address as the recipient, attach an item, or compose a
very long message .
Send a multimedia message (MMS)
1 . From the Home screen, tap Messaging .
2 . Tap Compose
.
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