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My father is an avid runner and he likes listening music while he does it. Once he was running and his phone just fell off and hit the ground. The display got cracked in one corner, next to the home button. It was operational, but nothing like a scratchless white iPhone , isnt it? :)
Never had done an iPhone 4 display replacement before. As It looks in the guide, you really need to dismantle every single piece of equipment inside of it to get to the display. Only the home button is one step away! I took a sip of tea, made a grid on paper and followed every single step on the iFixit guide. I got stuck with the flat screw holding the logicboard, the 2.5mm flat screwsdriver which came in the iphone 4 display assembly didnt really fit in, not because it was too big, but because it was not big enough to unscrew it... but luckily I made it through. The display is heavily glued to the aluminum chassis, so I had to spend 5 mins clearing it all with the spudger. Then I assembled everything back in, and it came back up ! The display works amazingly, you wouldn't say that it is not the fabric one. No lag, no different feeling when using it... it looks like a brand new iPhone 4 . My father is happy again, and now he is using a iPod Shuffle to run :) Thanks iFix it.
The 2.5mm flat screwdriver is small. Does not allow you to unscrew the screw on the motherboard easily. You can do it, but you might end up cracking the screw and not being able to pull it out at the end, so be careful. You need a slightly bigger one than that.
Be careful when placing the new display into the aluminum frame. Make sure there is no gap between both before-after screwing the whole 6 +4 screw points. If you realize too late, you will have to redo all steps to remove the logic board, vibrator, camera, connectors and the metallic plate which holds everything on.