Dear all, I have got the stock firmware for Blackview JK809. I hope it will help you with the problems you met.
Download Link: Firmware for Blackview JK809
Flash tool: Download link
2.Choose the right files in the package.Then click “Start all”.
3.Connect your phone with PC.
4.Wait several minutes until you see “100%”
5.Good job,you have reflash your phone.