Best friends Becky and Hunter find themselves at the top of a 2,000-foot radio tower.
 
Let's put it this way, the moment after these girls find themselves stuck at the top of a radio tower 2,000 feet in the air - they take out their phones, lift them as high as they can reach and try to search for a signal.  This will be the cleverness of the characters you will be watching.  Nuff said.
 
FUN FACT:  The film's original dialogue, which included over 30 F-bombs, was dubbed out to make this a PG-13 film once Lionsgate picked up the rights to the film. This was done using an artificial intelligence dubbing technology system that alters onscreen mouth movements. It was later released uncut on BluRay, in the UK.