There are many inexpensive after-market USB WiFi dongles that will upgrade legacy technology to the more recent 5GHz / Wireless 802.11ac standards. Here are some options from Amazon.
My computer only has 2.4GHz or Wireless 802.11a/b/g/n. How can I operate the Air Direct on 5GHz or Wireless 802.11ac for an optimal tethering experience?
Posted by: Rachel Godoy on Jan 29, 2020