IPhone 4 stuck on DFU

Here's what happened. I was charging my phone via USB through my laptop and it suddenly went into white/grey screen with weird screen and so I pressed the HOME + POWER and went into recovery mode (iTUnes + USB logo). I tried to restore it and I keep on getting Error 1600. After a few hours, the screen just went black and whenever I press HOME + POWER button, nothing happens. I went to a repair shop and a guy "shocked" the battery and there it went back to recovery mode. I tried to restore it again on DFU mode and still getting error 1600. If I try it on restore mode, I will get error 21. What I did is I plug in the device, put it on recovery mode and then put it in DFU then restore and still error 1600 ---- googleed and youtubed so,me videos until I saw a video to change the host file and downloaded it and then BOOM --- It was fixed!
While I was fixing my newly repaired iPhone 4 version 5.1 -- all of a sudden it went to restarted then went into recovery mode. After a few hours again, it went to DFU mode and I went to the repair shop to shock the battery but that didn't work until now. I can't get my phone to restore mode even if I press the HOME + POWER button. STUCK on DFU mode.
I have a saved SHSH for 5.0.1 and 5.1 -- so i built a custom firmware with Snowbreeze and iFaith but I keep on getting error 3014, 1600, 1601, 1608 on restoring it. I really don't know what to do from here.
Can someone please help me?

I have the same problem. An iPhone 4S, 6 months old, stuck in DFU mode, black screen and iTunes can't restore (error 1600). Tried reloading iTunes, tried 3 different computers (Win 7, Vista, OSX) all report the same problem.
This phone has never been jailbroken (don't need that in Oz because my carrier doesn't lock their phones). It still had the original iOS that it came with from Apple.
Like migsiliciousI read lots of post about using jailbreak software to kick the phone out of restore mode without installing a custom OS, but I'm not going to try that as the phone is still under warranty. If there is no simple solution to the 1600 error, then I'm going to have to travel 40km to the nearest Apple Store and see what they can do.

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Hi Alek Trueblood,
All support options for registered developers can be found here: http://developer.apple.com/support/iphone/techsupport/
Enjoy your afternoon,
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https://www.youtube.com/watch?v=UyUYkFHtlS4

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Hey jestinsinclairr,
Thanks for using Apple Support Communities.
After reviewing your post, it sounds like you had one issue and then got a second trying to resolve the first. A frustrating situation for sure. The first article linked has what to do if it is not powering on unless plugged in. The second article addresses the error you are receiving when trying to restore.
iPhone: Hardware troubleshooting
http://support.apple.com/kb/TS2802
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http://support.apple.com/kb/TS3694#10
Check for hardware issues
Related errors: 1, 3, 10, 11, 12, 13, 14, 16, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 1000, 1002, 1004, 1011, 1012, 1014, 1667, or 1669.
Have a nice day,
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My iphone 4s wont turn on with out being pluged in and when i unplug it it dies instantly i pluged it in put it in dfu mode and tried to restore it hoping it might help but its stuck in dfu and has restore error 21 help!!!

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Hey jestinsinclairr,
Thanks for using Apple Support Communities.
After reviewing your post, it sounds like you had one issue and then got a second trying to resolve the first. A frustrating situation for sure. The first article linked has what to do if it is not powering on unless plugged in. The second article addresses the error you are receiving when trying to restore.
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Re: Can "unknown error 21" be fixed ?? (iphone 4)

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http://theiphonewiki.com/wiki/index.php?title=ITunes_Errors
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Mac Medic ([email protected]) Oshkosh, WI
Re: Iphone 4s Help please Dfu mode Apr 10, 2012 10:01 PM (in response to XxUnknownkillax)
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