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Delete vendor.xml in the AppLoader folder.
Connect your 9790, select the device, and follow the prompts to install the new OS. Troubleshooting Potential Issues
Compare signal strength (in dBm) before and after. In the same location, new firmware should show ≤ -75 dBm. Firmware Change Update on BLACKBERRY 9790 Bold
Double-click to launch the BlackBerry Application Web Loader wizard.
This is the easiest and most secure method to update your BlackBerry 9790. Delete vendor
Updating via a computer is often considered more reliable. You can do this using the official BlackBerry Desktop Software.
Standard errors can pop up during legacy BlackBerry maintenance. Here is how to fix them quickly. Error Code / Symptom Root Cause Definitive Solution The device has no operating system installed. In the same location, new firmware should show ≤ -75 dBm
Follow the on-screen instructions. The software will download (if necessary) and install the new firmware.
: Connect the BlackBerry 9790 to the computer using a micro-USB cable.
Whether your Bold 9790 is suffering from boot loops, lagging menus, or you simply need to change the firmware version to unlock specific carrier features, this comprehensive guide covers everything you need to know about flashing and updating your device. Why Update or Change Your BlackBerry 9790 Firmware?
This guide outlines everything you need to successfully change or update the firmware on your BlackBerry 9790. Prerequisites Before Updating