If there is one Lumia 1520 that is the king of all 1520s it is an unlocked 1520.3 variant, which for those in the US comes with LTE support for AT&T and T-Mobile, in addition to 32 GB of internal memory and Qi wireless charging. Yes, it has everything.
Luckily, if you own that phone, you can now get the Lumia Cyan update, assuming you are not of the Preview for Developers edition of 8.1.
Full story from the WPCentral blog...