How to forward your desk phone to your cell phone
Press the button labelled Call Forward (usually button 6).
Press 1 to Set.
Enter 9 for an outside line, followed by the number.
Briefly pick up the handset and hang it up to save the setting.
You can confirm the number is correct by pressing Call Forward and 1 to view it. To be certain, you can make a test call to verify it forwards.
To cancel, press Call Forward, select 0, and briefly pick up the handset and hang it up to save the setting.