It’s an LG G8. One of the few phones that has a high quality DAC and amplifier in it. It sounds amazing with a good set of earphones and has plenty of options to tweak to your liking.
I wanted a dedicated DAP such as one made by Fiio, but they are astronomically expensive. My LG G8 was $200 after tax and a Fiio M11S is $700 before tax. I could bargain hunt for a better price but the G8 would always be cheaper. And because it’s a phone, it has more features and power than most dedicated music players (many of them are powered by ancient chips and struggle to do basic tasks) I just stick a large SD card into it and put it into airplane mode if I’m not using a streaming service.