How can take off the back iPhone 4?

[iMore Question]

I have a iphone4 how can I take the back off

 

[pkcable]

re:

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This is NOT something that is done by regular folks, and I do NOT recommend that you do it!

[WARN]You MAY damage your device![/WARN]

Ok warnings out of the way, please closely follow the instructions on this website, and/or search youtube for a video on this, they DO exist....

https://www.ifixit.com/Teardown/iPhone+4+Teardown/3130