How to forward a call from a cell phone?

Some of my users are forwarding calls to their cell phones, how can they forward a call to a different extension from their cell phone?

‘##’ very quickly on their cell phone, then they should get prompted to “Transfer” followed by a dialtone.

Also, of note, your Trunk Dial options should contain “Tt” for this to work properly in all situations.

You should not do this. This will allow the inbound caller and the outbound callee to both have the ability to use feature codes and be able to transfer themselves around in the PBX. This opens the system up to being exploited.