How to flash a ZTE Blade A5 smartphone?

Question

Android

When you turn on the smartphone, the message "no command" is displayed.
Hard reset does not help.
When I try to flash from an SD card, I write Status 7.
When I try to flash via ADB: device unauthorized. Debug cannot be enabled.
When you try to flash through ResearchDownload, it goes into the eternal checking baudrate.

Answer 1

https://4pda.ru/forum/index.php?showtopic=746032