Firmware portal
Integrity
SHA-256 hashes for current archive packages.
217c11a397ca912d10886679d61cbfaa03ada27f4d3b764a4abea1c6d5bf664074c9754740c2587b20cd1b59a665436a62887ff078f6d7b4e79feb07973bf626No hashes match this search.
OnePlus 15 · Chinese hardware
If you have a Chinese OnePlus 15 that was converted to OxygenOS and the bootloader was locked again, I strongly recommend restoring bootloader/Fastboot access now while the free method is still available.
You do not need to unlock the bootloader afterward. The important part is restoring access to the real bootloader/Fastboot mode.
If your device is affected, do this sooner rather than later.
Huge thanks to mikoker for discovering this method.