[Disconnect Phone] ➔ [Run Autoloader] ➔ [Connect via USB] ➔ [Automated Flash] ➔ [Reboot] Step 1: Backup and Clear Device Software

: Find a "Multilanguage" or "AllLang" 9900 firmware file. OS 7.1.0.1098 is generally considered the final stable version. : You may need (BlackBerry Swiss Army Knife) for wiping the device. Draft Guide: Flashing Steps Step 1: Prep the Firmware

: Older versions of Windows (XP, 7, or 10) are generally more compatible with legacy BlackBerry drivers.

Power down your BlackBerry 9900 entirely. Plug the Micro-USB cable into the PC first, then connect it to your phone. If your device is stuck in a boot loop or shows a dead battery icon, pull the physical battery out, plug in the USB cable, and reinsert the battery immediately. 5. Monitor the Automated Flash