Locate a reputable firmware repository to download the official "BlackBerry Bold 9790 OS 7.1" executable file. Run the downloaded installer application on your Windows computer. This automatically extracts and places the official operating system files into your system directories. Step 2: Delete the Vendor.xml File

In the context of BlackBerry devices, a "flash file" is the installation package for the BlackBerry Device Software—the device's operating system (OS). The term "flashing" means installing this software onto the phone's internal memory. While the most common method to update an OS is through official tools, "flashing" often refers to a more advanced, manual process that starts from a completely clean slate.

Download the package to your PC. Run the .exe file to install the firmware on your computer. Step 2: Delete Vendor.xml

The Loader tool will begin loading the flash file, initializing the handheld, and writing the new system files. Do not touch the USB cable or close the program during this time. The process can take anywhere from 10 to 20 minutes.

What (if any) is your BlackBerry 9790 displaying right now?

Download and install on your PC to set up the drivers.

is (Bundle 2841). While carrier portals have largely been shut down, you can still find these files through community-maintained archives:

With your BlackBerry still connected, find and double-click the Loader.exe file in the same AppLoader folder. Follow the on-screen instructions. The installation process can take from 45 minutes to an hour. Your device may reboot several times during this process.