Phone with special effect

For a quarter of the applications and it has proved itself. I use it via Blurtooth together with the Logitech Headset H 800 telephony base is a Fritz box 7390. A good team. So calls fun again.

This phone has a special feature, an effect that I did not know for me. If I'm not mistaken, the Siemens S4 sharpens the sound quality during a call. It is even not uncommon that the quality to maybe 15 - 20 seconds improved significantly. In the fixed line and mobile. Thus, from a first arg noisy cell phone call nor an acceptable understanding will, without the caller changes his location.

Strange then again, I always wonder why the line quality for calls from Hamburg is mostly bad, acoustically hard to understand. Not noisy, but far from sounding. Only from Hamburg. Although all incoming calls come through the fixed network. Perhaps an expert saying something.

Modest, it is in my eyes that callers stored in the phonebook not appear by name in the display. Or there's this really self-evident function and I do not just think. In the manual it is nothing. The German manual for the Siemens S4 are in the network. Only small and inadequate "Documentation" with "Quick Start Guide" is included (5 narrow sides).