Looks like AT&T has a much better testing crew than Verizon does! They have already released the Lumia Cyan update with WP8.1 for the Lumia 1520, now they are adding the Lumia 520 and the 925 to their "job completed" list. So what is Verizon doing? Why can't you get even ONE phone updated yet?! One word...PATHETIC!
What is Verizon doing? They are giving the signal loud and clear that they don't give a damn about those of us who use Windows. We are learning the hard way that VZW only wants to do android and apple, so if we want to be properly supported and updated -- AT&T beckons! Have been with them a long time -- almost 20 years -- and have so much NOT felt the love lately.