Ants Circling My Phone - Mysterious video of ants circling my iPhone

This video was filmed August 30th, 2015 on my front porch.
I used an iphone like this: ✗ http://amzn.to/1LbpRcH
which was placed in the center of approximately 300 ants.
The camera i am using for filming my videos is this:
✗ http://amzn.to/1NhN5DZ
i don´t know the reason for the ants to behave like this.

maybe this links will help:
https://en.wikipedia.org/wiki/Ant
https://en.wikipedia.org/wiki/Electromagnetic_radiation
https://en.wikipedia.org/wiki/Dipole
https://en.wikipedia.org/wiki/Smartphone

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