I have had zero problems with my X4s. Starting a few weeks ago though, my X4's wouldn't turn on when holding the middle key. But when put on the charger the green light comes on like they are fully charged. When I take them off the charger the X4's won't turn on and I can’t reset them either I bought them in Canada but I moved to Brazil this year. How can I be helped here?? Pleaaseeee
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