You need "Marvell AT Interface" drivers. These are often included in "LTE MiFi Generic Driver" packs found on community forums like Hovatek .
Often provides the tool along with specific firmware for Airtel M2 devices at their resource thread. Mifi Tool 1.4.0.0 Download
Reads and displays critical hardware info, including the PCB version and current lock status. Compatible Devices You need "Marvell AT Interface" drivers
This version of the tool is favored for its compatibility with older 4G LTE hardware. Mifi Tool 1.4.0.0 Download
Mifi Tool 1.4.0.0 is primarily designed for devices using . Common compatible models include: Airtel Vida M2/M2T (M022 / M022T).