How to use Yahoo!® Messenger for SMS
Pricing details
Carrier charges may apply for sending or receiving text messages. Check your wireless plan for details.
Signing in from your phone:

(1.1) Using text messaging, address a text (SMS) to: 92466
(1.2) Then, text: in [Yahoo! ID] [password]. Do not include brackets. See an example.
Seen by your Messenger contacts(1.3) Your contacts will now see you as mobile.Note: If you sign into the product from your phone, some carriers will send you an SMS that says you’re logged in.

If your Yahoo!ID is chatsalot77 and your password is 123456, your text should read: in chatsalot77 123456.
* Leave a space between in, your Yahoo! ID and your password, as illustrated.
