For me its the ‘Knock Code’ that LG had on their phones (I really wish LG still made at least the V series phones)

Basically there was a four-square area and you set up a sequence of where you would tap to unlock the phone. That set of squares was only shown when you set up the code

Then, to unlock your phone, you would tap those areas in the sequence you set up (even with the screen off).

Fingerprint readers are nice, but I really do miss the knock code

Edit: did find this article with a way to do the knock code, but if done wrong, could brick your phone I guess.

Plus, article is from 2014. When I looked at XDA’s info on it (they also being the developers) it looks like development on it is over, but individual modules may or may not still be supported by their devs

  • @AlecSadlerEnglish
    15•1 year ago

    100% this. I used to be able to control my ceiling fan, my portable a/c, and my TV from my phone.

    Now I have to use the fan remote, the a/c remote, and install and create an account with some stupid TV app.

    …it was also fun for changing the channel of TVs at bars & restaurants.

    • @[email protected]
      2•1 year ago

      You can still buy a universal IR hub and place it somewhere within line of sight of your appliances, then control it via an app, which often has Google Home / Apple Homekit integration.