"unknown" caller id if set to ring cell phone is active

[Richardkl]

Any Idea why I get "unknown" caller id on the mobile, if the extenstion is set to "ring my extensions and mobile at the same time" is active in the forwarding rules?

If I use ring groups the call the extension, and if no answer ,than call the the mobile the caller id is correct

 

[leejor]

You don't say how you are forwarding the call to your mobile. VoIP provider we assume.