i was using my older mi play as a router (temporary solution) until we moved and got a proper internet connection. (we were very close to the poland-ukraine border back then and only my old phone was able to pick up vodafone ua's 4g signal across the border)
it shut itself down multiple times and was constantly turning off the tethering mode due to overheating.

it still has vibrant permanent yellow burn marks on the display around the hot spots and only drains 0.5a while charging no matter what.