My mind keeps wandering back to that same question. Whatever it was, phone, simm card, motel keycard, something totally different, whatever it was, it brought things to a screeching halt. Searches stopped, information from LE came to a halt, townspeople stopped talking. It was like someone flipped a light switch. Whatever it was, that was "a game changer" and whatever the other quote was, I forget, it didn't seem to play out as here we are 7 months later.
To answer your question, I think it was her phone, but that's just a guess, I have no more information than you all have.
And for some reason, in my mind, I just don't believe the person who had been posting all over the net that he was the one that found it and it was a motel keycard.
JMOs