My BV9800 Pro will randomly lock up, usually happens when texting but don't know if that's what causes the problem. I tap the on/off button it works fine again..for awhile

My speaker works but sounds like it blown. Anything should do before replacing the speaker?

I am also having charging issues and do not have the original wire, it wore out early.
Where can I find a wireless charger for BV9800 Pro