Bought my x4 few months ago, was happy with it and recommended to my runner friends. Couple of days ago after using and charging them until the green led lit up, I tried to turn it on but the X4 wont power on. The power button is not responding to short or long or repeated presses so I am unable to do a reset. I checked for any sound from the earpiece while pressing, none. I was plannin to use the x4 on my up coming marathon, so hopefully I can get a replacement quickly.
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