To send a message to a friend who is either online or offline, create a text message in the following format:
to Yahoo! ID message
Using the Friend Code is a faster way to compose a message to a friend. The code is next to the friend's Yahoo! ID when you request the Messenger List. To send a message to a friend, create the text message in the following format:
to Friend Code message
Then send to your corresponding wireless carrier number as shown below.