Entering Fastboot mode is easy; it is harder. The BlackBerry Priv ships with a locked bootloader. While you can see the Fastboot screen, executing commands like fastboot flash will fail unless the bootloader is unlocked.
Once the PRIV shows the Fastboot screen: how to open fastboot mode on blackberry priv hot
Do you need help installing the or setting up ADB commands on your computer to interact with the phone while it's in fastboot? 0;16; Entering Fastboot mode is easy; it is harder
To open fastboot mode on a , follow these steps: Entering Fastboot mode is easy