Notice the two Tabs on the top. Call Forwarding and Find Me/Follow Me. You can select Either one but Find Me/Follow Me offers additional easy to use feature. Go ahead and select Find Me/ Follow Me.
This is self explanitory at this point. Make certain you select the Radio Button (Round area) Enabled and Save when you are done.
Hint. If you are going to forward calls to your cellular phone, adjust the seconds your cell phone will ring to determine if your voice mail on your cell phone will answer the call if you don’t answer the ringing phone or, the voice mail on your VoIP phone system. I.e. If your cell phone rings for 25 seconds prior to rolling to your cell phones voice mail and you want it to play for unanswered calls, you will set the number of seconds to something higher. Maybe 27 seconds. Otherwise, The VoIP phone systems voice mail will process the call.