Passengers on the flight and witnesses on the ground recounted their reactions when the incident happened.
He said he wrote to her saying, "Who is this? Nyrah? You OK?" and he told her their grandmother was in the hospital - which was a lie to see if she would call.
But he says the response he got was simply, "Yeah this me and is grams OK."
"It was a different feeling I had," Curry said. "Usually Nyrah would keep me updated with everything...but from Sunday it wasn't nothing."
Fliers have been posted everywhere with her worried brother's phone number on them.