Yes the Qtek 9090 have a microphone problem, is not the network is the Qtek.
I am in france on the SFR network, and the opérator not cut the sound in silence, the operator doesn't cut the sound, all is in continuous with all telephones except the Qtek
The micro has an intelligent system to improve the sound and saved the batteries I think. It would be necessary to cut it!!
i call the oficial Qtek repair service but...
the boss I say... You have ??? a 9090 ??? whaooo
not have info, not have doc...
I saw it in photo but I have touch it never !