This has nothing to do with this product. Only this much: if the call is accepted with the mobile, it only works if Skype is also started on the mobile and is accepted there. If it is accepted via call forwarding, Skype does not notice and you are on green... But as I said: this is a Skype question and not a Sennheiser MB660 question... I am otherwise very satisfied with the Sennheiser, even if it sometimes loses the connection. Installation also worked with admin rights...