Some things warrant further discussion. This, then, is a collection of things that don't.
The last big mobile technology change in recent history (2003, just 9 years ago almost to the day) was a relatively simple one. One primary band, 2100MHz, was auctioned off by the government. A whopping five mobile operators were awarded spectrum, and then had to deploy WCDMA technology in it. The same thing miraculously happened across much of the world, especially Europe, and '3G' handsets worked within this band pretty much without exception. Since then the rapidly changing pace ...
It's no secret, or at least a badly kept one, that I'm intrigued by Windows Phone, especially the tie-up with Nokia. Once upon a time I'd have simply bought one and had it as my main phone for a few months at least, but in the days of the iPhone there quite simply isn't anything else I could or would want to switch to. Now I need a 'second phone' as an emergency contact number. The Nokia Lumia 800 is not, perhaps, an obvious choice for this purpose, but the battery life improvements ...