You still need an unlocked bootloader to flash them. Some hardware-specific features like 5G or advanced camera processing may require manual fixes via tools like Treble Info .

Huawei stopped providing unlock codes years ago.

The in-display fingerprint sensor is generally fast.

There are no official builds of popular ROMs like Evolution X or LineageOS for this specific device.

With Huawei shifting entirely to HarmonyOS NEXT (which drops Android compatibility entirely), the chance of future custom ROMs for the P40 Pro is zero. The current GSI builds are maintained by only two developers on XDA (recognize users phhusson and AndyYan ). When they stop, the P40 Pro custom ROM scene dies.

Because the P40 Pro supports Project Treble, you can flash a . A GSI is a pure Android build that runs on any Treble-compatible device.