Firmware portal
Integrity
SHA-256 hashes for current archive packages.
0bdeb0d8459b2bda43363649f3e63a100ded46118dd8dd05a8749d113b257ecdfbd73c3488d23a5d548f71d98c22b2679a12d337afef49edf4b96eed5e32e7efNo 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.