The firmware checks a "Vendor ID" or "HW Version" string during the boot process. If you try to flash a generic ZTE firmware onto a device locked to a specific ISP, the device will often reject the update or, in worst-case scenarios, become a "soft brick."
A: http://192.168.1.1/hidden_version_switch.html (some models only). zte f601 firmware
[FEATURE] Consider adding F601 as supportted device #107 - GitHub 11 Oct 2024 — The firmware checks a "Vendor ID" or "HW
Only use firmware files obtained from your Internet Service Provider (ISP) or the official ZTE Support site . Using "beta" or unverified files from third-party sites can "brick" your device, making it unusable. in worst-case scenarios