Because RIM shut down the infrastructure supporting legacy devices, using the Application Loader can sometimes trigger errors.
Once the "Welcome to the Application Loader Wizard" screen appears, connect your BlackBerry to the computer via USB. The wizard will attempt to detect the communication port and your device’s PIN. If the device is stuck in a "nuked" reboot state, you may need to pull the battery and plug it in at the exact moment the "USB-PIN:UNKNOWN" text appears to catch the connection window. application loader wizard blackberry download top