theory 1) one of the girls got injured, other tried to help with the phone to take pictures at night and also died by falling off a cliff. river carried their bodies and animals pecked them. theory 2) attacked by predator animals. doesn't explain why no animals were in the phone's photos. maybe too fast. doesn't explain how the animals left the phones alone or why their bodies were discovered in their final state. theory 3) human trafficking or manslaughter. they were victims of attempted kidnapping to use their organs. they left evidence of the phones which would be stupid to miss from the kidnappers.  as you go through the theories it becomes more likely they really did get lost at night, in a foreign land, in a jungle, and were using early smartphones to try to find a way back. the failed kidnapping, murder, and animal theories just don't make sense given how they ended up found with the phones intact.
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