So one thing. Make sure the router has latest firmware and the router is not some 20 buck model.
So I'm trying to figure out what is happening at my GF's house. They are using the 2.4ghz channel on a dual band router, with a signal extender in the hallway roughly 10 feet away form the router. You wouldn't think that with 2.4 you'd need an extension in the small basement, but with out the extension, just on the other side of the wall from the router the signal drops off and becomes unusable. The connections average ping with servers in the same city is 30ms, average up and dwn spd is 2 mbps ±0.75. Often, up to 3 times a day, the signal will cut out until the extension (or sometimes the main router) are restarted. There will also be immense spikes down to 0.1 mbps and 200+ms ping to servers in the same city. But even with the mid range quality of 3 mbps we cant even watch a facebook video. Something is definitely wrong.
Now here's the possibly important part, her room mate is an online gamer and insisted on getting the router in his room for the ethernet connection. He knows a lot about this stuff but wont call the company who set them up, and just says everything looks fine. Is there a chance he's adjusted the QoS balance or w/e to amplify his own priority on the network?
What I've been able to gather so far, it sounds like we'd want to utilize the 5ghz band network in tandem with the extender since she's already got it. I tried with out looking up anything and pretty much disabled everything so I just set it back to normal and set out to the internet. I figure I'd get this conversation going while I look for how to switch over to the 5ghz.