Will an iPhone work in a vacuum?

You’re kidding, but a working phone was found on the ground after the panel blew out of the Boeing a few weeks ago.

https://www.theverge.com/2024/1/8/24029806/boeing-737-max-9-...

I don’t think there’s anything in a phone that’d stop its core functions in a vacuum. The human trying to use it, not so much.

I was kind of kidding, but I was also kind of intrigued by the idea. My instinct is that it would work in a vacuum, but that is just a gut feeling. But I also could not think of why one could not.

Overheating could be a problem. cooling by thermal radiation alone maybe isn't enough

wouldn't it use bluetooth in that case? Or does it create adhoc wifi connections somehow?

It will use bluetooth for discovery and then establish an adhoc wifi connection between the two devices.