All devices paired before. All this steps is just about connection. Android 7.1.1 1- Swipe down from top 2- Turn On Bluetooth (Automatically connects bluetooth headphone) 3- Open Music app I can connect my Bluetooth headphone with one single touch. iOS 10.2.1 1- Swipe up CC 2- Turn On Bluetooth (Nothing happens) 3- Go to the Settings 4- Go to the Bluetooth 5- Touch Headphone's name under the Devices section (Finally iOS connects to my Headphone) 6- Press the Home button for Music app 7- Open Music App Or 1- Go to the Settings 2- Go to the Bluetooth 3- Turn On Bluetooth 4- Touch Headphone's name under the Devices section (Finally iOS connects to my Headphone) 5- Press the Home button for Music app 6- Open Music App Q: So which one is simple? A: Android. Q: What is the Apple's motto? A: Simplicity. Thats all folks.