While using my iphone it just died suddenly - black screen, not responding, not charging when plugged in. My phone is still dead 24 hrs later, cooling down hasn't helped. What gives?

Was using the iphone hotspot to surf on the ipad while playing a game on the phone. Screen died, went black and the hotspot died. Phone has been non responsive, silent and black screen since. Waited 24 hrs, no improvement. Cold reboot - no response. Won't acknowledge a charger.

Any other ideas of what I can do?

Is the phone fried or just the battery?

A bit rough that normal use kills a phone.