Most Vida M2 devices are sold subsidized by a carrier. They are "SIM-locked," meaning the router will reject any SIM card from a different provider. An error message like "Invalid SIM" or "Network locked SIM" appears.
Unlocking the Airtel Vida M2 LTE router (models M022/M022T) to accept various SIM cards involves flashing specialized firmware and registering the hardware identity using the Marvell MifiTool. The process requires specific tools, including SWDownloader for firmware flashing and WTPTP drivers for device recognition. Detailed instructions and necessary software for the unlock process can be found in the guide at Unlocking Airtel Vida M2 Mifi Guide | PDF - Scribd Vida M2 Lte Router Firmware Unlock