Make and answer calls with AirPods Pro (all generations)
Make and answer calls
Wear your AirPods Pro, and make sure they’re connected to your your device.
Do one of the following:
Make a call: On an iPhone or iPad (Wi-Fi + Cellular models), say “Hey Siri,” then say something like “Call Eliza’s mobile.” On an iPad with Wi-Fi only, say something like “Make a FaceTime call.” To activate Siri when you press and hold stem, see Change settings for AirPods Pro (all generations).
You can also make a call on your device, such as in the FaceTime app
or Phone app 
.Answer a call: Press the stem once on either of your AirPods.
Note: If you turn on announce calls, you can also answer or decline a call using your voice.
End a call: Double-press the stem on either of your AirPods.
Mute or unmute during a call
During a call, press the stem once on either of your AirPods.
In certain apps, like FaceTime, you will hear a sound and see a message telling you whether the microphone is on or off.
Decline an incoming call
When your AirPods Pro are connected to an iPhone, you can decline an incoming phone call and send it directly to voicemail.
When you receive an incoming call, double-press the stem.
Answer a second call
When a second call comes in, press the stem to put the first call on hold and answer the new one.
Do any of the following:
To switch between calls, press the stem.
To end the current call and switch to the one on hold, double-press the stem.
You can switch the controls to end a call and mute or unmute. See Change how you end a call and mute yourself with your AirPods Pro.