Download File Unlock-zlt-p21.bin [ Safe – Handbook ]

: Some versions can be unlocked without files using a "14-14-14 seconds" reset trick performed on the physical reset button.

via LAN or Wi-Fi. Log in to the web-based management page (typically 192.168.254.254 or 192.168.8.1 ). Download File unlock-ZLT-P21.bin

: Navigate to System Settings > Management (or Advanced Settings ) and look for the Restore Backup or Update option. : Some versions can be unlocked without files