Because BlackBerry no longer officially supports BlackBerry 10 software, you must rely on trusted community archives:
The BlackBerry Passport remains an icon of productivity. However, as legacy services have reached end-of-life, keeping this device functional often requires a "fresh start" using an . Whether you are stuck on a boot loop or just want a clean installation of OS 10.3.3, this guide covers everything you need to know. What is an Autoloader? blackberry passport sqw100- 1 autoloader
: The tool will automatically detect the phone and begin flashing. Do not disconnect as legacy services have reached end-of-life