If you already have a newer firmware (e.g., V02C03) and need V01B07 for unlocking:
ZTE software version is a pre-release or beta firmware update designed to enhance performance, security, and general functionality across supported ZTE devices . As a beta version (indicated by the "b" in the version string), it provides early access to new features but should be approached with caution due to the potential for bugs. Key Features and Updates zte software v01b07 download work