LG U8150 User Manual page 148

Messaging
3. You can edit an MMS message field using the cursor.
4. Move the cursor to the To field, and enter the message recipient.
You can specify the recipient by either the phone number or the
e-mail address. You can search the phone book by pressing the
right soft key. When a recipient has been specified, another field
where you can specify another recipient appears. You can
specify up to 20 recipients.
<Select To item>
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U8150 User Guide
<To item option menu>