Once you have downloaded the BlackBerry 7.1 installer .exe file for the Bold 9900, double-click it. Follow the prompts to install the software directly onto your Windows PC. Step 2: Delete the Vendor.xml Files
Before you begin the update, back up your BlackBerry data. It's recommended to regularly create and save a backup file on your computer, especially before updating any software. This helps you recover smartphone data if the device is lost, stolen, or corrupted by an unforeseen issue. blackberry bold 9900 software update 7.1 download