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
my old phone, a samsung j7 i believe, had a live concert feature that would make the music sound much more like you were at a concert, it was a complete gamechanger in listening to live albums. my new one doesnt have that feature :(
Check out ViMusic open source app (available on fdroid) and it’s equalizer feature, you can achieve pretty much same effect. Although it don’t work on all phones.
Any phone has EQ capabilities
it wasnt just that, it had a specific toggle for it