Question about Xiaomi Mi Home Security Camera Basic 1080p

Correct, also works with a wifi hotspot. As long as the hotspot is available, the cam is also accessible. But I can't say whether both are possible with the same mobile phone. But I think so. If a separate device is used as a hotspot, then certainly. As soon as the hotspot is available again, the cam connects directly to the hotspot. So it is reachable again. Kind regards TBR