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iPhone 4 randomly “No SIM Card installed”

Your iPhone 4 is randomly loosing your sim card? I´ve got an solution which helped me after cutting my normal sim to an micro sim. But this solution doesn´t require a cutted out micro sim. It can also occur with an original micro sim. But if you did, you should first make sure that you didn´t damaged the chip on the sim card! The problem is, that the opening mechanism is sometimes causing a short with the contacts of the sim (left picture). To prevent this, I put some adhesive tape on the top of the sim tray (right picture).

After that no more “No Sim Card installed” message! Feel free to comment!

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