Depending on your wireless carrier and device type, you may be able to access Yahoo! Messenger through the instant messaging client that is already installed on your phone.

In your mobile phone’s Menu, click on the Instant Messaging icon. Select Yahoo! Messenger, and then provide your username and password.

If you access Yahoo! Messenger through the pre-installed client on your mobile phone, we recommend a text messaging plan from your wireless carrier. Check your wireless plan for details.

If you have a BlackBerry smartphone, please visit http://mobile.yahoo.com/bb/im/get.