Developers like Balázs Triszka (Balika011) have successfully ported LineageOS 18.1 (Android 11) to specific prototype units or via extreme hardware modifications. Hardware Modification:
LineageOS 18.1 is a popular custom ROM based on . It is widely known for offering a clean, near-stock Android experience with a focus on performance, stability, and privacy. For a device stuck on Android 6.0 Marshmallow, this represents a monumental leap forward. The people who have tested this build report that all the core hardware functions have been successfully ported. This means you can expect the camera, Bluetooth, NFC, Wi-Fi, and cellular network to work. Blackberry Priv Custom Rom
Sometimes, developers create "de-bloated" versions of the final stock BlackBerry firmware. These look exactly like the original software but run faster and allow for root access. For a device stuck on Android 6
Since you cannot install a custom ROM to modernize the device, here is the "review" of using the stock software today: and cellular network to work.
The Core Dilemma: Can You Flash a Custom ROM on the BlackBerry Priv?