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I got this iPhone 4s secondhand for 10$, but it seems to be stuck in recovery mode. I tried restoring with finder (MacOS 10.15.7)and it said Error (50) how do i restore
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How to factory reset APPLE iPhone 4S? - HardReset.info
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Solved] How to Factory Reset iPhone 4/4s with iTunes
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How To Factory Reset Your Apple iPhone 4S - Factory Reset