I've had the watch for several months and basically from the beginning there is a problem on all headphones. Bluettoth is so weak that while the screen lights up, the sound in the headphones trembles. The same situation is when running, if there is some vibration, e.g. after 1km, the voice in the handset is intermittent, it trembles. I used different headphones to check it, Philips, Samsung Galaxy Buds, I use Beats Powerbeats 3 for running. The worst thing is on Chinese headphones, even during normal operation, the sound is interrupted. Do I have a faulty watch or does anyone else have it.