I can not recommend the Sinus 806 IP. First man to download the latest software on the computer and then update the phone. The result was that I had no more ringtone only and only by removing the group assignment of telefonbucheintraege the phone for incoming calls and rings. But what was no longer displayed was the phone list and there was no notification of missed calls. Wrapped as a conclusion so quickly phone and returned, not to be used with such software errors.