due to the previously consistently good experiences with Siemens phones I have to decide, unfortunately for this device. I work in the home office and need the equipment daily. The pure call works well. The equipment, however, is disappointing. It lacks the ability to mute the microphone. A pause for remote answering machines or to dial into conference calls can not be programmed. So I have for my team calls every time again the code re-type (a basic feature in every mobile phone, 10 years ago). The Bluetooth headset is easy to no longer connect to the phone, could be a software upgrade of hope for improvement is unfortunately not possible, and synchronizing with Outlook I try rarely for security reasons. My conclusion, prefer the contacts by hand in a 'normal' phone equipped transmitted as pictures and contacts about unsafe synchronization playing on a mobile phone that does not have the most basic functions in daily use.