https://www.androidauthority.com/oneplus-hydrogen-os-update-aptx-768081/
HydrogenOS update for OnePlus 3 adds aptX support for better Bluetooth audio
Apr 28, 2017 - The HydrogenOS (or H2OS) version 12 beta update has launched for the OnePlus 3, introducing support for aptX Bluetooth audio codecs.
oneplus 3aptx supportupdate
https://www.androidauthority.com/oneplus-bullets-wireless-review-909408/
OnePlus Bullets Wireless review: aptX support and seamless autoconnect
Dec 18, 2020 - These bargain earbuds are a great option for OnePlus users, but are outshined by other offerings. Read our full OnePlus Bullets Wireless review for details!
oneplus bulletsaptx supportwirelessreviewseamless