There, alas, is nothing you can do to fix this issue. The hub doesn’t, indeed can’t distinguish between data being downloaded, ie game updates, which could be given a low priority and ‘voice data’ which is sensitive to any sort of delay and really should be prioritised. But, as I said the VM hubs simply have no means of doing this QoS (Quality of Service) as it is called. What happens then is all the outgoing data is treated the same but as you have seen this has a detrimental effect on the quality of voice traffic. It will affect the upstream more, so you will sound ‘robotic’ to others but, probably they will sound OK to you. Am I right?
The only thing you could do is to either not download anything while gaming, or you will need to get your own third party router which does support QoS and put the VM hub in modem mode. However this does require a degree of technical knowledge and configuration - it won’t be a ‘buy this and it’ll work out of the box’!
Your second point though is fixable. The red LED on the Hub 3 is an indication that it is overheating, or it thinks it is over heating - more likely the LED has aged and is no longer capable of showing the correct colour. Probably it isn’t actually overheating but it does need to be replaced, because, hypothetically if it WERE to overheat in the future, how would you know?
I suspect that within a day or so and member of the forum team will get to this thread and offer to contact you by direct message with a view to getting a new hub sent out (well actually it probably won’t actually be new, the Hub 3s aren’t made anymore, so it will be a second hand reconditioned one). But if they don’t then one thing you could try is to simply turn the hub off and then call VM and claim that you have no connection. They will ask you to reboot the hub, factory reset it and tell them what colour the lights are on it. Claim you have, make anything up!
Should you have to do this, is it a bit unethical? Possibly, but as you have already claimed VM are refusing to replace an obviously faulty device and one that could potential prove to be dangerous, so, you, taking steps to rectify this is probably fair enough!
