With the LG V50 (Android 10), the DAC works perfectly. I tested it with the stock cable and ddHiFi TC07s. It seems to drain the battery faster than the Cayin RU7, but I haven't encountered any operational issues. There's a slight heating, but at an air temperature of +31-32 degrees Celsius, I consider this quite normal. At such temperatures, all gadgets tend to heat up more than usual. The RU7 heats up significantly more (even without a case), but that's normal for it.
Sound-wise:
Even after the RU7, this DAC managed to surprise me. It has a smooth and calm sound. In this regard, the RU7 is the complete opposite. However, I wouldn't call the Onix's sound boring. Yes, at times, some might find it lacking in emotion, but thanks to its sound signature, the Onix sometimes delivers an even more cohesive sound picture. I would also like to note the excellent width of the soundstage. Depth could be slightly better, perhaps. The detail is also excellent, with the Onix emphasizing some details and the RU7 others. Overall, I'm satisfied with the purchase.