Originally Posted by HarryT
If you buy your Kindle from Amazon it comes per-registered, so that's not a problem.
I suspect we may be talking about 2 different things.
While the device was registered to my account when I bought it (from Amazon.com), I still had to go through with the device setup and activation process, which required access to a WiFi network. It was not until I had done the latter that I was able to use collections.