Nearly every other android phone available outside Asia has the Qualcomm built in DAC straight into the headphone socket. Adding a decent amp on that gives a good improvement if done well.
LG has gone further. I wish more people could appreciate it.
Speaking of the Qualcomm DAC, I thought back to this little tweak over on XDA-developers and wondered how much better a typical Qualcomm-equipped smartphone (prior to SD820, anyway, won't work on that or later going by recent posts) would sound with it set up.
https://forum.xda-developers.com/android/software/qualcomm-gain-control-t3253957
The only thing is that volume control has to be done through the notification panel, which feels like a bit of a kludge. Might just be a necessary workaround to circumvent the Android audio stack for all I know. Then again, with an external amp, that's not much of a problem.
I do appreciate what LG's doing for smartphone audio, but the unfortunate part is that the V-series smartphones, like most others, wind up not having another niche feature that I've come to depend upon in a smartphone now and then:
active pen input. Damn shame, too, because the V10 and V20 with a solid, pressure-sensitive and tilt-sensitive pen with seamless palm rejection would've been the real Note 4 successors that I wanted.
That's the problem with the smartphone market, really. Since 2015, it's been compromise after compromise. They took our removable batteries, our IR blasters, nearly took our microSD slots too, and now the tried-and-true 3.5mm TRRS headphone jack is looking like the latest victim. I could at least tolerate it a bit more if they just offered
dual USB-C ports so that a typical adapter/DAC dongle doesn't also block off the only charging/data port on the device (think about how stupid a laptop with only a single USB/charge port and no other I/O besides 3.5mm TRRS would be -
OH WAIT), but that's apparently a bit too much to ask.
6.35mm to 3.5mm adaptors ruin 3.5mm headphone jacks. The weight of the adaptor and the length causes too much movement on the internals of
the jack, causing loss of contact with the connectors. It's one reason I sold my T1s because it required an adaptor, and it ruined my laptop jack and some other equipment.
You could've just reterminated the T1 with a 3.5mm TRS plug and solved it that way, though I figure that's not the only reason you sold it.
Then again, cable-related matters seem trivial to me when I've used a soldering iron and multimeter before.