Sony WH-1000XM2/B Help Manual page 91

Supported profile: HSP (Headset Profile)
Outgoing call
Double-tap the touch sensor control panel lightly to cancel an outgoing call. (*)
Incoming call
Double-tap the touch sensor control panel lightly to answer a call.
During call
Double-tap the touch sensor control panel lightly to finish a call. (*)
*
Some devices may not support this function.
Related Topic
Receiving a call
Making a call
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