This article explains how to turn off Bluetooth on your Android device or an iPhone. This information applies to iOS 14 through iOS 12 and Android 10 and later.
2 Ways to Turn Bluetooth On or Off on iPhone
If you just want to disconnect headphones or another Bluetooth accessory from your iPhone, you can do so from Control Center.
To open Control Center on iPhone, swipe down from the top-right corner (in iOS 12 and later) or up from the bottom of the screen (in earlier versions of iOS).
The Control Center shows some quick settings for screen brightness, Bluetooth, Wi-Fi, and a Do Not Disturb feature. Tap the Bluetooth icon to disconnect all non-Apple devices.
