It is very very easy thanks to seamless integration, which Apple has done. All you have to do is to bring your AirPods case near to your iPhone and open the AirPods case. The moment you open the AirPods case, your iPhone will detect it and will give you prompt to connect like the side image. Tap the connect button and you are done. Your AirPods are connected with your iPhone and they are ready to use.
If you do not want to use your AirPods with your iPhone, you can disconnect them easily. Follow below steps to disconnect AirPods with the iPhone.
Step 1: Go to Settings
Step 2: Tap "Bluetooth"
Step 3: Tap "information button" besides your AirPods
Step 4: Tap "Forget this device"
If you have already paired your AirPords with your iPhone and want to pair with any other iPhone, you need to follow the below steps.
Step 1: Open your AirPods charging case
Step 2: Tap "Connect"
Step 3: Press and hold the "pairing" button on the back of the case.
You can use Apple AirPods with your Android phones. Check this video to know more on how to connect your Android phone with Apple AirPods.
Look past their offbeat design and you'll find that Apple AirPods' compact size and high convenience factor are a winning combination.