way through the picture, Jill calls her friend at  the bonfire, but the static on the cellphone is nothing like the  sounds one would expect from a real cell phone, when reception is  poor. Also, the intercept she receives in subsequent attempts to  call her friend, includes, initially, chimes initiated by the old  Bell system decades ago for land line phones. Cell phone companies  dont use those chimes, nor do they use the wording used in this  movie. The recording wouldnt say: "Im sorry, the person youre  trying to reach is out of range," not since the nineties anyway.