About Samsung 5GHz wifi
A member wrote "My "router" is an Apple Time Capsule. Updating the firmware in the Time Capsule to 7.5.2 resolved my problem"
The issues of getting the Samsung wifi sticks and devices to work on the 5GHz channels is multi-faceted. Since Samsung does not test with all things and can't support your router, LAN or "network" you may find yourself updating and trying settings on your own.