Just as you can start an instant message conversation with other people, they can start one with you.
To open an instant message
When you receive an alert for an incoming instant message, the alert displays the sender’s name and the first few words of the message. You can interact with the alert in one of the following ways:
Tap Chat to open a conversation window and view the entire message.
Tap Ignore to close the alert.
Do nothing until the alert disappears.
If you do not immediately view an incoming message, you can tap the conversation in the Current Conversations group at the top of your Contact List to view the message later. The Current Conversations group above the Contact List will list the conversation in bold type to indicate that you have an unread message. The Today screen on the device will also indicate that there is an unread message in Communicator Mobile by displaying the conversation name in bold type.