Question about Gigaset Da810a

unfortunately, only 3 ringing melodies are available, not 10 as stated. a nerfing but well audible pip tone can be set in 3 speeds. the haedset connection, which is also stated on the box, is not compatible due to the lack of a cut point on the telephone. The mounting device could be improved as the standard 2 screws in the upper part of the phone are insufficient for wall mounting. it would be better to use 3 screws or to position the existing ones more centrally.