The Samsung S5 I’m working on boots up, thanks to a vanilla firmware update that I found on the web. Once I flashed the firmware using ODIN, The phone booted up and went through the setup steps. After setting a Google account, I was left at a screen asking for an old Samsung account.
There are scores of videos that walk through a step to get to the settings menu to turn this feature off via voice settings, but this phone bypasses the menu that allows this.
What I did find was having the ability to sideload an app to go to the settings menu using a USB 3.0 OTG Flash Drive. Here’s one of several videos: