How do i change my cell phone number in my messanger?

If you sign up to receive messages on your cell phone from your messanger to where when you sign in it says %26quot;im mobile%26quot; beside my name,what if you get a new phone and number?..i did and i need to know how to change it to my new number from my old number because i cant find a way to change it.How do i change my cell phone number in my messanger?Here is the place to go to learn how to set up Yahoo Messenger for mobile:http://messenger.yahoo.com/mobile.php;_y鈥?/a>
How do i change my cell phone number in my messanger?
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