I just switched to the S8+ from a Nexus 6p. I was enrolled in the beta program, and just last week I was given an alert that I could say "Okay Google" even when the screen is off. It worked awesome! I hope we get this feature soon on the S8. Currently it only works if the screen is turned on.

How to Access the “Google Settings” App on the Samsung Jun 10, 2016 Okay Google isn't working - Huawei Mate 10 Pro | Android May 01, 2018 Learn What Google Pay Is & How To Use It - Google Pay To buy things in stores, Google Pay requires you set a screen lock and unlock for most purchases. If you lose your phone, the screen lock helps prevent fraud. On Android devices, you can also lock and erase it remotely with Find My Device. Learn more about Google Pay security features. Okay Google: Ask Alarm.com to Arm the Security System

An interactive list of over 150 commands and 1000 variations that you can ask Google's voice assistant. Made by @thekitze

Okay? - Apps on Google Play Jul 14, 2020 Change the AI assistant on your phone - Mobile | TV

OK Google

On your iPhone or iPad, open the Google app . At the bottom right, tap More Settings Voice. From here, you can change settings like your language and whether you want to have a voice search start OK Google Voice Commands (Guide) - Apps on Google Play Mar 27, 2020 15 Cool Things to Know about Google Home Alarms How to Set an Alarm on Google Home. You can use various voice commands to set … OK Google An interactive list of over 150 commands and 1000 variations that you can ask Google's voice assistant. Made by @thekitze