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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!
I also forgot, it's stuck in DFU mode, and the iOS was corrupted when I got it.
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Try to flash with 3Utools
这个答案有帮助吗？
are you sure all the connections are fine? dock and cable I mean.
Yes, and I was doing it wrong anyway. :) I downloaded the actual program, and it fails at 13% saying invalid serial number.
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.
这个答案有帮助吗？
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.
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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