Where most Android OEMs layered skins, BlackBerry layered a fortress. The Priv’s firmware included a hardened Linux kernel with enabled by default—rare in 2015. It featured DTEK , a firmware-level monitoring suite that tracked app access to the camera, microphone, and location. But the crown jewel was BlackBerry’s Integrity Detection , which would notify users if the device was rooted or the bootloader unlocked. Unlike a Nexus or Samsung, tampering with the Priv’s firmware meant permanently losing core security features—a digital suicide pact.