Did the box last Saturday ordered and Tue. she was there then, real fix!
For Device: All cables plugged in and the box turned on. Access was typing a breeze, even my regional provider was in the list. Shortly thereafter, the box was immediately online, after that I then first partly filled with the latest firmware. It was followed by the configuration of the phone. Since I have a telephone with voice mail, I came with his TAE plug connected to FON1 and then started the Asisstenten the box. No 2 min. Later it was all over. I sometimes try disconnecting the DECT function of the box tested with the built-AB, so everything went like hot cakes!
Since then, the box is completely stable and without disconnections. The buttons for WLAN and DECT also work. The NAS function, I will be testing soon as I have an external enclosure.
My conclusion: just buy it !! The devices of AVM are simply the best, especially if you want to have as many features as possible into one device. The only thing that this box is different from the 7390 missing VDSL support and 5 GHz wireless band.