After 2 months of use the rear speaker has stopped functioning !!!, where can buy the speaker alone without the housing ?.
Blackview I'm disappointed, and probably not the only one with this problem

I had a similar problem - my loudspeaker started sizzling terribly after a few hours of use. The same happened with the ear speaker. I bought new ones from AliExprees and got them replaced in a local service center. They worked again for a few hours then started sizzling terribly again.

This phone is a very good idea but is very crappy built - a lot of factory faults - you can check the forums not only here but the XDA developers as well for confirmation. I trashed it and got back to my old BV6000s which is behaving very well for more than 20 months.

So - my advice is to look for a new phone.

i had the same problem!!

I am also facing the same problem. I bought this device from GearBest and within a fortnight, volume fluctuates so erratically, that it feels so embarassing while with friends or relatives, and even being alone, this causes really nuance.