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4-inch iPhone released in March 2016 with similar hardware specifications to the 6s. Available in Silver, Space Grey, Gold, or Rose Gold with 16/64 GB storage options. Model A1662 and A1723.

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Why is my iPhone "uncalibrated" after a screen replacement

When I press the bottom row of letters on my keybord when holding the phone in portrait mode it always clicks the middle keyboard row. The screen is “uncalibrated“ after the screen replacement. Does anyone know how I can try to fix it? Maybe one of the cables connecting the screen to the iphone back has a bad connection but doesn anyone have a hint at which one? Also the replacement screen is about half a mm too long and the screen at the bottom of the iphone is just resting on the frame. Could this affect it at all? Any help or information on how this part of the iphone works is appreciated.

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Your problem is in your description: “the replacement screen is about half a mm too long and the screen at the bottom of the iphone is just resting on the frame”. The housing was likely bumped and it has to be reshaped to allow the screen to sit flush, with just very little resistance when pushed in place. Reshaping or replacing the housing is probably all you need. You may try to sand the screen a little along the borders, but the frame is thin and fragile, be careful not to exagerate.

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Thanks for the help! Do you know why this might affect the calibration? I've tested it while the screen was completely out of the back end and I get the same problem so I assumed if the problem was because the case did not fit back in then the calibration would be even more messed up if I remove the whole thing from the case.

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@Ted S If you try it out of the frame make sure it lays flat without any flexing when you put pressure on it. The touch is the longest of the connectors and it's a bit more troublesome to be put in place, check it's not curved and press it on the edges, not in the center, until it fits in place with a little click. Also check the pins are all in place firmly and aligned, better with some magnification. If yet you have trouble, it might be a defective screen.

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I fixed it! I opened it back up and check the 3 ribbon cable at the top. The bottom one was not at all connected and when I reconnected that cable the screen was 100% functional again. Thanks for the suggestions!

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If the screen is “too long” the top end may not have been hooked onto the case properly, or the case has a dent preventing the screen to move into place.

Screen calibration has always been present, it’s just that the older models had more consistent screen suppliers so their electrical properties usually match, so the calibration data is good enough for a new screen. Starting with iPhone 5 and especially iPhone 7, more suppliers join the party and consistently is all over the place. Apple always have the method to recalibrate the screen after replacement so it is not a problem for them. Average plebeians will have to try and find one more or less matches, or just live with it, just like marriage.

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Ted S will be eternally grateful.
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