I hear you and I agree.
But reading the information that google brings up, this issue sounds a lot more wide-spread than some random failures.
I have not however found any discussion that gets into the nitty gritty technical detail of exactly what's happening and why.
The information is usually - if you have the problem, here is what you can do.
And the suggestions are sometimes a bit ridiculous, at least in my opinion.
Like don't use the device, switch to a different WiFi frequency, run USB 3.0 at USB 2.0 speeds....
How about a real fix rather than these work-a-rounds?
Maybe the devices with the problems are just not shielded adequately - possible that the samples submitted for regulatory approval were fine and then the manufacturing run had a problem.
I would just send any new product back if it creates that much interference with my WiFi signal.
Consider this: Nobody goes to the Internet to say "it's working." They go to say "it's not working." Then once the issue is raised, the echo chamber starts to fill up with others who have the same or similar issue. And if any one of those folks goes to another site and complains, the same folks follow and create a new echo chamber there. Hence, any problem seems much more wide-spread than it probably is. And when someone writes an article like the one linked to earlier, the echo chamber(s) get louder.
The reasons there are no "nitty gritty technical detail(s)" is that it's most likely a failure and failures can take many forms, so no definitive cause. But failures can be corrected, so there are lots of "here is what to do" postings, most of which eliminate the failed or failing device. Don't use the device is the easiest, so that's why it's suggested. If your car has a flat tire, change the tire. Don't drive the car with it.
Switching frequencies is another "get away from the problem" solution. But you cannot "run USB 3.0 at USB 2.0 speeds," AFAIK. The speed is negotiated by the devices attached to the hub, not a setting. And if the problem is the hub itself, it's not the devices, it's the hub.
The "real fix" is to replace the defective hub/device.
Not every device requires shielding. And shielding against a hardware failure is not required, as you cannot predict what the failure will be. The regulations simply require that a properly working device be within certain limits. Most manufacturers select and test random samples of products to evaluate quality of the assembly line. If a batch fails quality tests, they stop to find out why. But el-cheapo products may not have that quality testing. If sufficient numbers of them radiate in an unapproved manner, they can be restricted from the market, but if the manufacturer can show that it is taking steps to improve quality, the devices can continue to be sold. I am pretty sure Anker does such testing, but even then a certain percentage of products with incipient, undetectable minor flaws will pass inspection, but then fail in full service when temperature shifts exacerbate the minor flaws into failures or weak components fail under daily full use. It happens. Even Rolls-Royce makes a lemon every once in a while. Every product fails at some rate.
Your last sentence is the best idea. That way the manufacturer gets the defective product to test/evaluate for the failure and you get rid of the problem.
The root of the issue is really that the WiFi frequency is used by other services--wireless phones on landlines, remotes for some devices, Bluetooth communications, etc. Each is supposed to "play nice" as the frequencies are shared, but that "play nice" is voluntary, and not everybody follows the protocols. Now add in that if you are in a dense housing location (apartments, duplexes, town homes, even suburban homes that are close together) all of your neighbor's signals are also in your house. I, for example, can see at least twelve different WiFi routers from my home. All of those are using the same 2.4gHz band, plus all my (and their) BT devices, WiFi printers, etc. One thing you can do is to run some network analyzer and see what channels are most busy and move to something not so busy. Unfortunately, in the 2.4gHz band structure any given channel can cause some interference on adjacent channels up to 3-4 away from it. Nothing defective, just physics. So if you are on band 6 (of 12 available) then anything from band 3-9 *might* interfere.
The advantage of the 5gHz band is that there are more channels and more space between channels, so the likelihood of interference is much lower. I suspect that as the lower band gets more and more cluttered with BT and other wireless signals everywhere, it will stop being that useful for WiFi and the "default" will move to 5gHz or even higher if congestion continues.
