I'm on my fifth and everyone has had the issue. My store bad a bad batch of replacement devices, one the antenna, one a bad screen, one wouldn't boot, and the most recent has a bad speaker. The manager is having a brand new device shipped to my house in the original packaging.
Do NOT replace your unit with a refurb if all you hear is a clicking with wifi. A future software update will fix the issue.
Yeah, just like it will fix the antenna issue.
Sorry, t'was too tempting.