I've been using these for a few days, and....
1. Whenever I initiate a call through cellular (Android phone), WhatsApp (Android phone) or Skype (Windows 10 laptop) the headphones enable ambient mode (pass-through) even if noise cancelling is chosen. I can still hear a slight difference between the ANC and Ambient mode during the call if I switch back and forth, but the ANC is nowhere near normal ANC performance and taking calls in noisy environment is a pain. Moreover, even in passive mode I hear less background noise than in ANC during calls. And the outside noises don't sound the same as in "real" Ambient mode. I don't have an explanation for this. Is that normal on the latest firmware?
2. I hear voice distortion during cellular calls. I did a factory reset on the headphones, and I'm going to try an iPhone today. But since I'm not going to replace my phone anytime soon, I'd like to make it work with my Note 5. Could it be BT radio interference? I have great connection during music playback without any issues.
Aside from that, and relatively poor microphone, the earphones seem nice. But I'm not ready to deal with the drawbacks like that for the price. Any opinions?