Do you mean non-heat infrared? It's probably not very controversial to say that all of our skin is quite good at detecting radiant heat.

In your philtrum. Close your eyes and hold your finger under your nose. Sensors activate.

Maybe not the same thing but holding a finger 1cm away from your face between your eyebrows creates a very strange sensation.

The only thing controversial is that I should not have made that post here on hn. Actually it's so clearly against the rules that even this is not controversial, sorry.

Skeptics like you are why we can’t have any superheroes like Parent :( (just kidding in case it was t obvious)

For about a year I could tell when my phone was about to ring in my pocket before the screen turned on. Something in the telemetry hardware stack whirring up made it feel a very very very near-imperceptibly tingly.

But then I changed phones and it doesn't happen anymore. Or, lower chance, there was a software update.

I believe it was the Pixel 3a.

Back in the flip phone days some people had little dongles hanging from their antennas that would light up seconds before the text chime went off. I guess it sensed the incoming transmission?

Must have listened to that little GSM handshake melody that used to be everywhere where speakers are connected to an active amp.