Connecting with the "Sony | Headphones Connect" app
Launch the "Sony | Headphones Connect" app on your Android™ smartphone/iPhone to connect the headset to a smartphone or iPhone. For more details, refer to the "Sony | Headphones Connect" app help guide.
https://rd1.sony.net/help/mdr/hpc/h_zz/
Note
- The connection with some smartphones and iPhones may become unstable when connecting using the "Sony | Headphones Connect" app. In that case, follow the procedures in “Connecting to a paired Android smartphone,” or “Connecting to a paired iPhone” to connect to the headset.