That is the one I was talking about, it says it restricts firmware updates in download mode, not access to download mode itself
Nothing in there even mentions Download Mode strangely - only firmware recoverySAFE, whatever that means
I'm assuming you've tried safemode:
- Turn the device off.
- Press and hold the Power key past the Samsung Galaxy S7 screen.
- When "SAMSUNG" appears on the screen, release the Power key.
- Immediately after releasing the Power key, press and hold the Volume down key.