I just installed the latest elementary OS and am missing Wi-Fi drivers. My chip is a Ralink RT3290. I've tried practically every guide which apparently 'solves' this issue, but none have worked thus far. I get errors while doing the 'sudo make' step in the solution mentioned here and nothing seems to be able to fix that. Hoping someone here has a solution.
This guy seems to have the solution.
and follow the instructions in ReadMe inside the RT3290 folder.
Hope it works for you.