How to power off your Galaxy phones without a power key

1. Open the Notification Panel: Swipe from the top of your screen and tap the Power icon. 
2. Tap 'Power Off". 

Bixby can carry out a lot of the tasks you do on your Samsung Galaxy devices. Bixby Voice can be activated via a long press on the side button of your device. You can also activate Bixby Voice by following the next steps:

1. Click the “Bixby” app icon in the Samsung folder.
2.  Click the “Start” button.

Once Bixby is active, say "Turn off the phone" or "Power off the phone".

Important things to consider for Bixby Voice

• To use Bixby, you must log in to your Samsung account and connect to your data network (Wi-Fi or data network).
• The Bixby features and content providers may vary depending on the country, language, device model or OS version.
• The user interface may vary or change depending on the device.