I have a Linksys Smart-Wifi router and I have an internet speed of 4Mb/s. Whenever someone is using more than 0.6Mb/s the ping in games, such as Overwatch, jumps from 80ms to around 160+. This makes games unplayable. I am plugged into Ethernet.
I've heard of something called QoS, and my router doesn't seem to have such a thing except something called "Application Prioritizing".
It accepts 4 ranges of ports that you can select between UDP, TCP, and both. According to the blizzard forums, there are these ports:
TCP: 1119, 3724, 6113, 80
UDP: 3478-3479, 5060, 5062, 6250, 12000-64000
Which ones do I use? Will this solve my issues? If not, what else can I do?