This is the most important step before you do anything else. Flashing your phone will wipe all user data, including contacts, messages, photos, apps, and settings. Use BlackBerry Desktop Manager or other tools like BBSAK (BlackBerry Swiss Army Knife) to back up your device first.
When the process completes, your phone will reboot. The first boot will take 20-30 minutes. You will then see the welcome screen. Follow the prompts to set up your device. blackberry 9800 flash file free
If you downloaded firmware that does not exactly match your original cellular carrier, your PC will block the installation unless you delete the vendor restriction file. Open your Windows File Explorer. This is the most important step before you do anything else
Before starting, ensure you have the following downloads ready: When the process completes, your phone will reboot
Ensure you are using a good USB port and cable.