I just received a new Fire TV cube gen 3, because my old one is malfunctioning. I know, I hate these devices myself, but it’s the only option right now, since a new version of the Nvidia shield isn’t coming in the foreseeable future.
So, I plugged in the power chord and the HDMI cable into the cube.
When it booted up it showed a screen that it’s downloading the newest update. At first I thought this must be some typo-bug on the initial boot steps, because I haven’t even connected it to the internet yet, neither via cable nor did I go through the wifi setup.
After the update has finished, I was greeted with my real name and the cube indeed had the actual WiFi settings!
WTF?! How’s that even possible?
At some point with the old device you agreed to Amazon saving used WiFi networks on your account, it asks you during setup of all Amazon internet connected devices. All Amazon has to do is connect the device serial number with your Amazon account ID, which is one of the options when you buy an Amazon device.