Introduction
The official guide has been updated and can be found here. This guide is archived for historical purposes.
Tools
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            Heat the backglass with a heat gun. 
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            Use a suction cup and a card to gently remove the back glass. 
 
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            Use the heat-gun to heat the fingerprint. 
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            Push the fingerprint to remove it from the backglass 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.