How to fix "My Number: Unknown Number" on the call screen

(Tech Tip: Blackberry) How to fix "My Number: Unknown Number" on the call screen

Options > Advanced Options > Sim Card > Phone Number
Click menu on the number area and choose "Edit SIM Phone Number" and enter your phone number

If you still don’t see it you may need this too:
At Phone Dialer Screen > Options > General Options > Show My Number = YES.