When I connect qudelix to my phone(galaxy s21 ultra) via cable it force reboots my phone after couple of seconds. Any ideas what's causing it?

Do I need amp to drive DT 990 Edition 32 ohm? Using Galaxy S21 Ultra with usb c - 3.5 adapter? Thanks a lot.

Would Qudelix5k be adequate? If I get amp/dac it would have to be one that can be used directly and Bluetooth too.

Thanks. To be honest not really sure as I'm very new to this stuff. I had Soundcore, Soundpeats, etc TWE, Sony WH XM4(just sold them)a and Aria's are my first IEM. After listening to Aria's I got curious and would like to hear what's next level from Aria. S12 is basically mentioned everywhere...

I have currently Moondrop Aria's (new in the IEM game) which I'm really impressed with. I was thinking to upgrade so looking at Letshouer S12/S12 pro. Shouer S12 is currently cca 160e, S12 pro 180e. Paid 90e for Arias so basically these are double the price. Are they really twice as good, am I...