Are you trying to the device for a new SIM, or are you fixing a connection issue with your current Vodafone service?
However, navigating firmware downloads for this specific model requires caution, as installing the wrong file can "brick" the device.
– The M028T is an older model (released ~2016–2018). Newer LTE hotspots (like the M035 or M042) are often cheaper than time spent reviving a bricked unit.