TPLink can't be trust any more. Let's move to other link.

You can switch off your 3G / 4G by going to Network > LTE Dial Up > Mobile Data > disable. Not sure if that is what you want.

Yes, I am also one of the victim!! I have sent an email to ask my local customer support regarding the missing QOS feature. And this is how they replied me. :mad: Just said sorry and that is all....

Model : Hardware Version : Firmware Version : ISP : Hi, I have just bought a brand new TS-MR6400 V2 LTE router. I was very excited to the new router, but I can't find QoS feature in the interface. I...