. This process allows the device, often locked to a specific carrier like , to accept SIM cards from any network provider. Purpose of the .bin File
: If you prefer a safer, official route, third-party services like DirectUnlocks offer IMEI-based unlocking that doesn't require manual file flashing. Download File unlock-ZLT-P21.bin
The file is a configuration or firmware file used to "openline" (unlock) the Zhi Ling Tong (ZLT) P21 4G LTE router . This process allows the device