I'm running iOS 8.3 on my iPad and a couple days ago started to get a pop-up message that I've never seen before. It says: Carrier Settings Update New settings are available - would you like to update them now? choices are "not now" and "update" I selected "not now", not knowing what this is about. I haven't made any changes to my carrier (Verizon) account. Does anyone have info on what this is and why it just now started appearing? Thanks!