Question 1: try to restore the factory settings or upgrade the system, the results?
When I press power + volume up or down, the menu is in Chinese - I can't understand it. How do I reset to factory? Link?
Question 2: check whether the SD card is FAT32 format, the phone supports FAT32, or try to replace the SD card, the results?
FAT32, yes. SD card is new & works - given up on that idea for now. Has anyone else reported issues?
Question 3: the latest software is the Android 7, you can choose to upgrade OTA or SD card upgrade (official website has explained)
I performed using the Flash tool - but regardless of the 2x official Vernee roms installed, the problems continued
If the above recommendations can not be resolved, it is recommended to go after the sale of testing, thank you
Do you mean to contact the people I bought the phone from for warranty?