Depending on your
wireless service provider, this feature might not be
available.
Note: If you have BlackBerry Mobile Voice System installed on your device or you have multiple phone lines, you might have to
select a specific phone line first.
In the Phone app, swipe down
from the top of the screen.
Tap > Call
Forwarding.
Set any of the switches to On.
To change the number that your calls are forwarded to, tap the drop-down
list under a switch and type a number.