How do I pair my headphones with a mobile device?
The recommended method is to download the Bose Connect app, power on the headphones, and follow the on-screen connection instructions. Alternatively, remove the headphones from the charging case, turn on the Bluetooth feature on your mobile device, and select your Bose headphones from the device list.
From the official Bose QuietComfort Ultra Earbuds manual, page 26
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