Google ANDROID 2.3.4 - Manual (Page 231)

Messaging 231
AUG-2.3.4-105 Android User’s Guide
Exchanging messages
You can send text (SMS) messages of up to 160 characters to another mobile phone.
If you keep typing after the limit, your message is delivered as a series of messages.
Multimedia (MMS) messages can contain text and a picture, a recorded voice, an
audio file, a video, or a picture slideshow.
Messaging automatically converts a message into a multimedia message if you send
it to an email address instead of a phone number, add a subject, or attach a media file.
Send a text message
1 On the Messaging screen, touch New message.
2 Enter a mobile phone number in the To field.
As you enter the phone number, matching contacts appear. You can touch a
suggested recipient or continue entering the phone number.
You can also enter the name of a contact with a mobile number.
3 Touch the composition text box to start entering your message.