Flashing the wrong firmware (e.g., using an E3372 firmware on an E3272) will turn your device into an expensive paperweight. Recovery requires a "Boot Repair" service, which is complex.
Earlier versions (V1.0, V2.5) had compatibility issues with newer chipsets (HiSilicon Balong V7R2 and V7R11). Version 3.3 brought support for:
Disclaimer: The author and publisher do not condone violating ISP terms of service or local laws regarding device modification. This guide is for educational purposes only regarding legacy hardware repair and interoperability.