This phone is for my office and it performs its duties very reliable, the battery lasts a long time and the charge lasts max. 1 Hour. Yet it runs over my Fritz box (7490), but will still order the corresponding PBX, because I can then use some more features. Only communication with the dealer did not work quite as well, since it has not responded to my email (I needed a change of address on the invoice) since the phone can not do anything for, yet only 3 stars ...