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发售于2016年9月16日。型号为1660、1778。有 GSM 或者 CDMA 网络制式可选。提供32、128或者256GB 的存储空间。提供玫瑰金色、金色、银色、黑色和亮黑色。

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Why isn't my touch screen working after screen replacement?

I cracked my phone a couple weeks ago and got the screen replaced. Since then, I've been having trouble with my touch screen. It won't always register my touch, and sometimes it will move/type/click on something without me touching the screen. Before getting the screen replaced, even after the phone cracked, the touch screen worked perfectly. What could this be, and how can it be fixed?

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Did you make sure all ribbons and connectors were firmly in place when you replaced the screen? One possibility could be a loose cable. What you can try doing first is performing a restart a couple of times to see if it calibrates properly. Press and hold down the home button and power button simultaneously until the apple logo appears, then let go. Do this a few times, maybe 3, and see if it helps. If that doesn't help, then another possibility could be that the screen is faulty. If so, have it replaced.

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Maybe some screws was mixed and install wrong lead to this issue.

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Also this issue was present on iOS 11.3 when using an aftermarket LCD. You can try updating to 11.3.1. Sometimes it can fix this issue.

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