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Plug the micro-USB cable into the computer, and then connect it to your phone. Step 4: The Flashing Process

The Ultimate Guide to BlackBerry Bold 9900 Autoloaders: How to Revive Your Classic Device blackberry 9900 autoloader link

Close BlackBerry Desktop Manager if it opens automatically. Plug the micro-USB cable into the computer, and

Once the software detects the phone, the command prompt will start scrolling through "Writing" commands. unplug the cable. The phone's LED may turn solid green or flash. The process usually takes 5 to 10 minutes. Step 4: Final Reboot blackberry 9900 autoloader link

At its peak, the Bold 9900 was considered the "nicest BlackBerry ever" due to its premium build and specialized hardware. Blackberry Bold 9900 Review