Second generation of iPhone. Model A1241 / 8 or 16 GB capacity / black or white plastic back. Repair is more straightforward than the first iPhone. requires screwdrivers, prying, and suction tools.

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Error 6 fix?

I've been trying to reinstall iOS 4.2.1 on my old 3G iPhone, but it throws back error 9 or 6 every time. I've already tried most of the common solutions. Can anybody offer any assistance? Thanks!

Update (06/17/2017)

I also forgot, it's stuck in DFU mode, and the iOS was corrupted when I got it.

Answer this question I have this problem too

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Try to flash with 3Utools

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are you sure all the connections are fine? dock and cable I mean.

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Yes, and I was doing it wrong anyway. :) I downloaded the actual program, and it fails at 13% saying invalid serial number.

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This tool is very useful~ And about invaild serial number, you can try to enter your device to DFU mode and flash again.

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Your device is stuck on DFU, you can exit that with 3uTools.

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With the serial number issue, it refuses to flash. It's also stuck in a somewhat damaged DFU mode, so the only way I can get it to even begin the process is by cheating with iTunes and unplugging it once it reenters recovery mode. I'm honestly a little stumped on this.

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If serial number issue issue still exists, there may be hardware issue. You are suggested to get a repairman to check your device.

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Nikola Wozniak will be eternally grateful.
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