Hi @Denis_O your suggestions are very useful and I have linked your “case” here Easy Installer - Documentation Suggestions.
I wonder if you feel like validating your “successful” SM-G950F + Easy Installer experience on this new page List of devices working with the Easy Installer.
You might consider it over intrusive asking you to validate the device with your username, but anyone thinking of using Easy Installer for that model, clicking on your name may find your post and see both the positive and negative of your experience. 