I was playing with a Motorola G72 and noticed this feature by accident: double-tap on the back of the phone to trigger a custom action.
Here is a video showing this feature
This is not the same as double tapping the fingerprint scanner. This phone has a front-facing under-display scanner.
It’s very neat and handy, I hope other phones implement this too.
Update: See this comment for a link to an app that enables the feature on many phones.
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On other devices, you can use Tap, Tap but it may not work as well
Requires root or a compatible Pixel device…
I just got it working on a non-rooted Galaxy S10
it’s not necessary anymore, I’m using it on a non-rooted phone
Yeah just tried it and it worked!