u need to do exactly like in the post above -
Make sure you have working adb and fastboot on your PC and have the bootloader unlocked on the watch, for the AmazFit Stratos you need to unlock the bootloader on the site: [Ukryta Zawartość]
Download the zip file to your PC and unzip the content
Windows: double click the file “flash.bat” - then connect watch to the PC - and switch on watch
If you haven't already connect the watch to the PC, do it now and press enter
As soon as you see a white triangle on the clock press enter again (IMPORTANT!!!), from this moment the procedure starts and you shouldn't disconnect the watch, you just have to wait for the end of the flash (that's it - please wait - installation in progress)!
The installation takes about 8-10 minutes, during the whole procedure the watch stays with the white triangle screen, when it has finished the watch it will reboot itself and you will have installed version 220.127.116.11!