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The autoloader will automatically wipe the existing corrupted system partitions and write the fresh OS 7.1 images. You will see percentages or file blocks rapidly uploading in the command window.
Once finished, the window will close, and the phone will restart. Troubleshooting and Essential Tips
The command window will begin listing technical sequences, indicating that it is wiping the sectors and flashing the new operating system images (such as boot.mfi , sys.mfi , and application binaries). Step 5: Reboot and Setup
Using the autoloader is straightforward, but it requires a Windows computer.
The Ultimate Guide to BlackBerry 9900 Autoloader Links (OS 7.1)
