The LED should be expected to outlast the rest of the phone by a large margin. That said, given enough units out there, it’s statistically inevitable to get a couple with some issue that die earlier.

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If phone manufacturers cheap out, they can fail to handle the heat from continued LED use (e.g. as a flashlight) which can cause premature failure

No but I did have a flashlight fail me while I was exploring a long abandoned power plant and in a dark room with evidence that someone may have been living in the facility. I only shit my pants a little

I think it only fails on horror movies other than that i have never seen one fail IRL.

I once got a „refurbished“ phone from a third party shop where it was not working. But I guess it was a defect from the refurbishment itself. They repaired it though.

Other than that, no. And I don’t think the LED would fail, maybe the plug would rattle loose.

No

Yes. Samsung S6 edge I think? Before flashlight was an intentional functionality. I had an app or a ROM that gave me a flashlight button but if I used it too long it would stop working for a while. It would come back eventually but made me nervous so I avoided using it for more than a few seconds.

Now I’m curious as well. I use it often, but not for that long each time. I know it gets hot after a while and it drains the battery.

How long is it supposed to last?

No, at least not independently of other hardware failures.

Fail as in did not provide enough light to walk through the woods, then yes. I have flashlight in my EDC.

If you mean the screen, then yes.

no but I have often thought that it would be a good thing if it did because I hate light

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