Calls went with all 6, there is probably Differences specific to type (position of the microphone), but for the occasional conversation rich all. Contract negotiations I would do with any of them.
The Sonixx:
the design initially acts as a deterrent, but it proved to me as the only true. With classical listeners have the keys in the cable, to fish always briefly around until the correct key has. Here one knows immediately which key is which. In addition, you want to back tight "tension" in general, the cable between the ears, while the control panel in the cable disappears far behind the ears. Not so with this design.
We have here probably a felt huge thing hanging from your ear, but it is so lightweight that it does not matter, even while running.
Set up a cap over it is difficult even when the BT phones with traditional design, because these are too large. After all, there it is possible here not.
The sound is surprisingly good. Something middle-heavy, perhaps. One can very well live with it, especially given the incredibly low price.
Makes Finally a handset when you change the volume no annoying beep. Very good!
Other functions such as on / off / pairing trigger a sound, others have here a voice that says what happens. I find that so less well at the Sonixx, mainly because you have to stay an eternity on the button on and off. A clear statement would help here. But considering the price these are quibbles. It works, that's it.
The downsides are a relatively cheap plastic, no seals, a huge vertrottlet Case (but at least one case!) And unfortunately an absolute no-go for me: no microUSB jack but something special. I am not willing to drag for as a utensil extra cables around. This can be embarrassed forget. Micro-USB, however, is everywhere.
I must mention the price again. The next class of devices, which are twice as expensive is sound significantly better. And with the Sonixx sound at least you can live well. So if you is not an absolute quality fanatic, the money is halfway matter (and you can live with the extra cable), you will encounter an ingenious choice here.
Thickness buy recommendation !!