The voice quality of the phone is on my Fritz! Box 7320 (or 1 & 1 Home Server) with a 1 & 1 DSL connection (16,000 kbit / s) wonderful. No noise, no Doppler, nothing. The coverage is for me less important (1 bedroom apartment with 47m²), insofar as there is no direct evaluation on my part. What I want to emphasize is the fact that you can also access with such a cheap phone to the phonebook of the Fritz! Box. Simply press the intercom button, just to get into a menu from which you can call up a few features of the router (including the answering machine). It must be noted that there is no "synchronization" with the call list. So if you call on the phone book of the box, will appear in the call list on your phone logically only the actual numbers. Besides, you have the appropriate number and "local" saved.
Two little niggles have opened up for me ... On the one hand there are the really .. Yes .. Let's just say "native" ringtones. Both selection and quality can definitely something to be desired. Furthermore, there is no headset port, which now, the reason for me is that I'm going to look soon for a new handset. But can absolutely get over in the price range. Otherwise, I would recommend this unit at any time.