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Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.

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Is it a locking agent (blue stuff) on every screews

(blue stuff) is it locking agent on every screews also bottom screews?

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Yes. But it is not to stop you from unscrewing the screws, they are easily unscrewed as screws without it would be. It helps keep the iPhone together, think of it as anti-vibration safety mechanism. Without it the iPhone would be prone to having the screws loosen and damaging the iPhone.

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alex will be eternally grateful.
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