This is spot on. My N5 indicates roaming any time I fall back from LTE to cdma1x 800 to receive the call, but it is not actually logged as roaming. I was in a sprint store today asking about this. It was kind of funny watching the guy fumble around trying to figure it out. First he tried telling me it's because the phone was set to global, then my prl was out of date, then needing an updated profile. Ultimately he caved in and admitted he didn't know why it was doing it and handed me the phone back.