This tool is considered legacy/abandonware (support ended ~2016). Version 1.4.0 (2021) would be a community-modified or final OEM build. Below are the features that made v1400 “better” than v1.0–v1.2.
The Marvell MiFi Tool is a software application designed to help users manage their MiFi devices, which are mobile hotspots that provide internet access on-the-go. The tool allows users to configure, monitor, and troubleshoot their MiFi devices, ensuring a seamless and reliable internet experience. marvell mifi tool v1400 download 2021 better
is a specialized utility used primarily for servicing and unlocking Marvell-based mobile routers like the Airtel Vida M2 How It Works and troubleshoot their MiFi devices
Let me know which one fits your needs.