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There are various popular USB Wifi dongles on the market that use varieties of this Ralink chipset.

“USB Wifi can sometimes be helpful as a backup, if the internal Wifi is wonky. Here’s the change log description of this work in progress:

As a result, the team will be adding support for certain USB Wi-Fi dongles so users will have backup connectivity if the internal wireless radios aren’t up to snuff in some environments. I’ve never had issues using the internal Wi-Fi radio on my Chromebooks, but of course, that’s a minutely small sample. Apparently, the Chromium team has seen reports of “wonky” Wi-Fi connections on Chromebooks and other Chrome OS devices.
