IIRC, she said that she checked her phone...MOO
Always wondered how she was able to hear the men "talking in low voices ". Because she also said that both her dogs and the Celis' dogs were going crazy, and barking.A lot... Just a thought...
Also, IIRC, at one time she said she thought it might be people taking a walk. It seems that it got more specific as time went on, more like "men outside Isa's window" rather than "thought it might be people taking a walk".
http://www.hlntv.com/video/2012/04/26/key-witness-isabel-celis-disappearance