Modifying mobile phone firmware carries inherent functionality risks.
You must have BlackBerry Link installed on your PC for the correct drivers.
Your PC lacks the correct drivers. Reinstall BlackBerry Link or manually update the device drivers via the Windows Device Manager under "Network Adapters" or "Ports." blackberry classic anti theft removal firmware
What or screen is your phone currently stuck on? Which operating system is your Windows PC running?
After the flashing process is complete and the phone restarts, it should prompt you to set up the device without asking for the previous BlackBerry ID. Reinstall BlackBerry Link or manually update the device
Connect your powered-off BlackBerry Classic to the PC to confirm the device manager detects it as a BlackBerry boot device. Step 2: Download the Target Firmware and Tools
BlackBerry Protect Anti-Theft is triggered when a device is "wiped" (factory reset) without first signing out of the BlackBerry ID. As of OS 10.3.2 and later, this protection is enabled by default. If the device was not properly unlinked, it will demand the original user's email and password upon completion of the initial setup wizard. Connect your powered-off BlackBerry Classic to the PC
If your BlackBerry Classic is permanently blocked by Anti-Theft and software methods fail, your best option for a functional device is purchasing a cheap "for parts" Classic with a broken screen but an unlocked motherboard, and swapping the logic boards.
Send it back. The seller sold you a brick. Unless you want a desk ornament or a dedicated writing device (using the built-in Docs to Go), move on.