I recently bought this dongle https://www.amazon.co.uk/high-performance-technology-Frequency-adjustable-Raspberry/dp/B01C2N2O8S/ref=sr_1_8?ie=UTF8&qid=1475442936&sr=8-8&keywords=5ghz+wireless+adapter It clearly says that it can connect to GHz networks however it doesn't let me connect to any as they don't show up.The network works fine for my phone and other device so it isnt a network side problem.