I just tried my LG V30 ThinQ with my S2D for the first time, and found the DAC does not work well with this phone. I've never bothered before, because this phone plays Hi-Res including MQA well with its internal quad DAC. I wanted to see what the updated official Tidal app will do via USB, now that it can do MQA 1x software decoding. I doubt that would show up via USB, and I also don't see an option for bit perfect passthrough to a full decoding DAC, but it was worth playing with. I also tried UAPP. No such luck, as unlike @Mark Dirac and his LG G6 I can neither power the DAC with my LG V30 nor play all Hi-Res and MQA files correctly through the S2D even when the DAC is externally powered. Adding a USB REGEN in-between did not help this time. No worries, the phone alone is fine.