E900 Linksys Router slow on wifi but fast on ethernet

The solution

1. Go to http://192.168.1.1 and login to your router. If you’ve never done this, look for instructions that came with your router or do a google search to find the default username and password.
2. Find a page that has QoS settings. For the E1200, you need to click on “Applications & Gaming” and select the “QoS” sub-menu.
3. Disable WMM Support.
4. Click save.