I've tried with manually created profile, but there is no difference. I am waiting on LG support to answer, but as I wrote before, TV works perfectly when connected to my home WiFi, or to my phone...

I bought new MR6400 v4 and new LG TV 50UK6470PLC. I am using 4G connection via Tele2 provider. I have set up router following instruction from the manual, and it went well for all devices except TV....