F_Λευτέρης_Νικολόπουλος_ , via OnePlus 7 , Dec 10, 2019 : I just bought the WH-1000Xm3 and when I got home my phone felt extremely sluggish and loading media on apps was way too slow. It annoyed me a lot and I tried 3 things: 1→reboot 2→reboot router 3→clear cache from recovery none of those things worked and I tried taking a speedtest. I got no more than 4 mbps. My internet connection is around 50mbps and seeing 4 felt weird to me. I theorized that my headphones were causing the problem and I simply disconnected them and took another speedtest. I got a very typical 44 mbps which was what I was expecting. I wanted to make sure it wasn't a coincidence so I took another test with the headphones connected and then I disconnected them halfway through the test. It did validate my theory 100% as it started off at 5 mbps and skyrocketed when I turned off Bluetooth. I paid 250€ for these headphones and having to experience this annoying issue on my 600€ phone isn't very awesome. Please get this fixed because it's infuriating.