The touch screen comes after a day with the mail. Who himself has no precision mechanic tool is a set should order with tools. Installation instructions, visit en masse on the Internet. The iPhone must namely be disassembled for replacement part. Therefore it is advisable not to mix up many little screws of various sizes. I have drawn for the contour of iPhone on a DIN A4 sheet and put the screws removed at the appropriate place in the drawing. When assembling then you know exactly which screw while. After about an hour the iPhone my 13 year old daughter was like new and 100% functional again. Hint: Good night's sleep go to work. With trembling hands, which is nothing ......