What is this gadget in my 'new' phone?

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sybersitizen Forum Pro • Posts: 21,382
What is this gadget in my 'new' phone?
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I finally had to make the move to a better phone to replace the one I've been using for ten years. The 'new' (used) one is a Galaxy S10e (2019).

One thing that has me baffled is this little sensor at the far right of the camera group:

Here's a closer view showing better detail of what's inside:

It's in the correct position be to be a heart rate sensor, but the S10e doesn't support heart rate monitoring. I suppose it could be such a sensor although support for it was omitted in the S10e design.

The same question has been asked by others elsewhere, and some people say it's a 'light sensor' ... but I've tested various operations with it exposed to the ambient light and completely blocked, and I can't see that it makes any difference.

Does anyone know what it is?

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