My phone number appears as Unknown in the Phone application

If your BlackBerry smartphone uses a SIM card, try changing the phone number on your SIM card to change how your phone number appears in the Phone application.

1. On the home screen or in a folder, click the Options icon.
2. Click Device > Advanced System Settings > SIM Card.
3. Highlight the phone number.
4. Press the key > Edit SIM Phone Number.
5. Type your phone number.
6. Click OK.