I use the headset with a Nokia 6310i and so far it has yet works very well. But the sound is a little muffled and sometimes hears me the opposite with some reverb. I suspect, however, that this is also the old phone. Did not have a chance to try it with a new mobile phone. I could not use it without bracket, since it kept falling out of my ear. The small temple I can, however, put on with one hand and it does not press. By the second, larger strap, it is suitable for certain other ear forms.