I'm such a user -- a new VZW customer actually (long time AT&T iPhone subscriber). My phone didn't have a pop up either. Luck I read this story, the force worked perfectly. Before I read to the part ...

I have a "AT&T" iPhone 5 (not 5s) -- can I move this to Verizon's network? My research has been inconclusive, some say yes, some no, some saying only the 5s would work.

I noticed this story late last night, basically another ‘iPhone 5’ tease that’s even bigger news from where I sit than whatever newfangled whatsits Apple’s tucked under the hood: global Verizon iPhone ...