I have the same problem , nocharge , battery 0% , the LED Red on but battery 0% , solution ?

I have my BV8000 Pro for 10 days and I have problems when I make or receive phone calls, even with calls from whatsapp, my audio gets low and they do not listen to me for a moment and then come back, I to the other person I always listen well, Difficult to communicate like this and I use it to work,...

13 days ago I received my BV8000Pro, I have problems with the audio of my phone calls, they do not listen to me or they listen badly or the volume is turned down in a moment, this happens to me in different calls, in a moment they hear me well and then something happens, now I'm changing my SIM as a...