palmOne Vision Smart Device Treo 650 User Manual page 204

Messaging Tips
You can address messages to multiple recipients by separating the addresses
with a comma.
When entering a message, you can insert emotive symbols by pressing Center
and selecting emoticons, or insert predefined QuickText phrases by selecting
QuickText and then selecting a phrase. To add a new phrase, select Edit
QuickText from the list.
You cannot use all symbols available on your device in your messages. The
Messaging application automatically replaces invalid characters before it sends
messages.
You can send and receive text messages even while you are on a phone call.
This is easiest when using the hands-free headset or speakerphone.
192 Messaging