For me it’s the notification light you used to find on older phones, was particularly good to know if your phone was charged without picking it up

  • @xarexyouxmadx
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    61 year ago

    For me it’s this (the color coded notification LED on phones) and while on the topic of phones I used to have a xiaomi phone several years ago that had an infrared face unlock feature so you could use face unlock in complete darkness. Haven’t had a phone with that before or after. It was awesome.