I give you guys a little hint here...
Check this LG G5 Hifi Plus USB DAC module.. it works on any smartphone and Laptop.
In my opinion LG Hifi Plus dac module is the best ever created.
https://www.lg.com/uk/support/guides/mobile/g5/hi-fi-plus
It sounds incredible with my IEMs......
I tried it long time ago. And i think it is still too bulky for portable use. The sound is bright though.