Yes me. I have the feeling something started to move a bit when turning the phone. It's still working perfectly. And I didn't drop it. Also assumed the battery since it feels like it's something heavy. I wonder if I should fix it or ignore it. I don't want to live without the phone while it's being repaired
I've seen Blackview BV6000 Teardown Review Disassembly & Assembly on Youtube. The internal battery appears to be lightly glued. It looks like clear gooey glue solution to me.
If I disassemble the unit myself, would it void my warranty?
As with everything. Going inside will probably void the warranty - depends on your skills, video guide is good. If you bought on AliExpress and such, there is little possible support from seller that wont cost you a lot of time and postage.