4. Method 2: Manual Firmware Change (The "Vendor.xml" Trick)
Warning: Never download .exe files from unknown forums. Look for signed installers from carriers like Vodafone, T-Mobile, or Rogers. Firmware Change Update on BLACKBERRY 9790 Bold
: If you see this on your screen, don't panic. It means the old OS was wiped successfully, and the device is ready for the new one. Firmware Change Update on BLACKBERRY 9790 Bold
Open . If prompted for a password and you don't have one, just click OK . Click the Connect button, then select Wipe . Firmware Change Update on BLACKBERRY 9790 Bold
: Link your 9790 to a Windows PC or Mac via USB and open BlackBerry Desktop Software .