To have your device replaced under warranty, you'll have to contact your seller. He will honor warranty terms.
Here you can find official repair services near your country:
Aeron wrote:blackview_admin wrote:The update is launching, be patient a little bit more!
Do you confirm the date given by the post above (october 2018)?
regarding improve signal strength, it have to done manually, like changing charge board?
any more options without opening phone?