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If you're follow this video tutorial to fix you iDevice, YOU ARE RESPONSABLE IF THINGS GO WRONG.
In case you put HEAT to open the Screen, make sure you don't put to much heat on it cuz you can damage the screen or the Battery. Try to put heat where I'd indicate to do so... 10 seconds max. of heat by the HOME BUTTON and 8 seconds on top. then go back and do another 10 seconds close to the home button & 8 on top with a 1/2" or 1" (inch) of distance.