It’s easy to add another mobile number you can use for IMs. Here's how:

1. At the top of the Messenger window, click the button showing a mobile device with a small arrow pointing to it.
2. Click "Edit Mobile Device."
3. On the web page that opens, under the information for the number you’ve already registered, click "Add New Device."
4. Follow the steps to add a 2nd mobile number to get IMs when you’re away from the computer.

Once you’ve added the number, you can choose it the next time you sign out of Messenger, either by:

• clicking the button at the top of your Messenger window that shows a mobile device with a small arrow pointing to it.
• clicking Messenger and selecting “Sign in to __________ (the new number you entered).”