Not sure what specifically you mean. Most smartphones today come with one of the assistants (Google, Siri, Alexa, or Bixby) turned on by default.
No matter how many damn Google Assistant settings I disable in how many fractal menus, it STILL "helpfully" pops up if I say out loud "ok google"!
Like, "heyy I noticed you're trying to talk to me though I'm disabled, would you like to enable me?"
Stop spying on me you piece of malware.
And, still, I can install LineageOS or other privacy-respecting systems on my phone. We don't have any custom firmware for an Echo or Alexa yet (to the best of my knowledge.)
If you choose to disable Google Assistant completely, follow these steps:
Open the Google app and select Menu (the three bars)
go to Settings
Google Assistant section click Settings > Phone and disable the Assistant option
I have a custom domain and disabled it for my family:Switch off Google Assistant (for entire custom domain) Click Search and Assistant. Tip: Scroll to see all services. ... Control who uses Search and Assistant in your organization
At the left, select the organizational unit.
Select On or Off.
To keep the service turned on or off even when the service is turned on or off for the parent organizational unit, click Override.