Error 21 Jailbreak 5.0.1
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Jailbreak Developers iPhone Dev Team Saurik MuscleNerd Planetbeing Comex Pod2G P0sixNinja i0n1c iH8Sn0w GeoHot NotCom Jailbreak Guides iPhone Jailbreak Tutorials Jailbreak iPod Touch Jailbreaking Explained Cydia Jailbreak Software Sn0wbreeze Absinthe Blackra1n LimeRa1n JailbreakM Redsn0w Greenpois0n PwnageTool Seas0nPass iPhone Unlock Unlock iPhone Unlock iPhone 3Gs Unlock iPhone 4 Unlock iPhone 4s Ultrasn0w News IOS Wiki Fix iTunes Error 21 During Custom IPSW Restore [How-To Guide]By Ben Johnson last updated June 27, 2014 Share on Twitter Share on Google+ Share on Facebook Share on LinkedIn Jailbreaking your iPhone, iPod Touch or iPod using custom IPSW made by PwnageTool or Sn0wbreeze https://www.youtube.com/watch?v=NlVnxz9hZzo requires a full firmware restore using iTunes. During the restore process, if you encounter Error 21, it means that you are trying to restore custom IPSW using the recovery mode. To fix this issue, you must put your iDevice into DFU mode.DFU or Device Firmware Upgrade mode allows all iDevices to be restored from any state. The actual difference between recovery and DFU mode is that when you put http://jaxov.com/2011/03/how-to-fix-itunes-error-21-during-custom-ipsw-restore/ your iDevice into DFU mode, it do not loads iBoot automatically. When you put your iPhone in recovery mode, it loads iBoot which makes sure that the firmware you are trying to restore is greater or equal to the current firmware.To fix iTunes error 21, you must put your iDevice into DFU mode using the following instructions:Connect your iDevice to your PC or Mac via USB cable and launch iTunes.Hold down the Home+Power button for 10 seconds.After 10 seconds, release the Power button but keep holding the Home button until iTunes detect your iPhone in recovery mode.Once your iDevice is in DFU mode, you should see nothing on its screen. It should be completely blank.Even if your iDevice is in DFU mode, iTunes will detect it as a recovery mode device and will display a message as shown in the above screenshot. As soon as you see the above message, restore custom IPSW and hopefully this time you will not get iTunes Error 21.Be Sure to Check Out:Fix iTunes Error 3194 While Restoring iOS 5.1.1 on iPhone, iPod & iPad
Contact Us for News Tips, Corrections and Feedback Related posts How to Fix “This copy of iTunes is corrupted or is not installed correctly. Plenot post a blank message. Please type your message and try again. Bo98 Level 1 (10 points) Q: Error 21 (and 1600 in DFU mode) when updating/restoring to iOS 5.0.1 I am getting Error 21 when I update or restore my iPhone 3GS (currently at 4.2.1). I don't https://discussions.apple.com/thread/3617189?tstart=0 have any security software installed so that shouldn't be the problem. Trying to restore in DFU http://www.jailbreakqa.com/questions/109944/error-3194-21-when-trying-to-restore-iphone-4s-501 mode brings up an Error 1600 instead. I have also tried using a different USB port with no luck. I have tryed redownloading the update with still no luck. Also my iPhone is not and has never been jailbroken. Anyone got any ideas? iPhone 3GS, iOS 4.2.1 Posted on Jan 1, 2012 8:04 AM I have this question too Close Q: Error 21 (and error 21 1600 in DFU mode) when updating/restoring to iOS 5.0.1 All replies Helpful answers Page 1 Next by jk_baller23,★Helpful jk_baller23 Jan 1, 2012 8:14 AM in response to Bo98 Level 4 (2,129 points) Jan 1, 2012 8:14 AM in response to Bo98 I believe editing your host file should do the trick.change your hosts file line into:#74.208.10.249 gs.apple.com(that is: put the hash (#) before 74....) Helpful (1) Reply options Link to this post by Bo98, Bo98 Jan 1, 2012 8:17 error 21 jailbreak AM in response to jk_baller23 Level 1 (10 points) Jan 1, 2012 8:17 AM in response to jk_baller23 There was a gs.apple.com in my hosts file but I still get the problem after commenting it out (even deleting it all together didn't work). Helpful (0) Reply options Link to this post by jk_baller23, jk_baller23 Jan 1, 2012 8:20 AM in response to Bo98 Level 4 (2,129 points) Jan 1, 2012 8:20 AM in response to Bo98 Did your phone have the connect to iTunes icon or was it still in DFU mode? Helpful (0) Reply options Link to this post by Bo98, Bo98 Jan 1, 2012 8:52 AM in response to jk_baller23 Level 1 (10 points) Jan 1, 2012 8:52 AM in response to jk_baller23 I get Error 21 through recovery mode and Error 1600 in DFU mode. Helpful (0) Reply options Link to this post by Bo98, Bo98 Jan 1, 2012 2:13 PM in response to Bo98 Level 1 (10 points) Jan 1, 2012 2:13 PM in response to Bo98 Anyone got any ideas? Helpful (0) Reply options Link to this post by ldjh1985, ldjh1985 Jan 1, 2012 2:20 PM in response to Bo98 Level 1 (15 points) Jan 1, 2012 2:20 PM in response to Bo98 You 100% its never been jailbroken? normally 1600 errors are related when trying to restore standard firmware... you will need *additional software* ;-) wink wink Helpful (0) Reply o
/r/jailbreak for news and updates. You can use Cydia Impactor if you need to un-jailbreak an 8.1-8.4 device without restoring. Instructions for jailbreaking iOS 8.0-8.4. Before asking a question, check Frequently Asked Questions to find quick answers! How to fix some mysterious problems.
Error 3194 & 21 when trying to restore iPhone 4s 5.0.1 0 I'm trying to update my iPhone 4s on version 5.0.1 (9A405) to the latest 5.1.1 but when I try, it gives me error each time. I've tried restoring it and got the error 3194 from iTunes, then while it was in recovery mode it gave me error 21. For some idiotic reason I thought it had something to do with the jailbreak and something I had installed through Cydia so I went and deleted all the sourced and packages I had installed which, of course, deleted Cydia. When I try to "re-jailbreak" my device with the latest redsn0w it tells me that it is already jailbroken and gives me the option to continue and install something I'm not 100% sure on - using the VPN and profiles - even it didn't work. I've tried using iFaith and TinyUmbrella, I'm not that familiar with them so I might have been doing it wrong, but they both told me my device was unsupported. When I tried to restore using iTunes (holding shift and choosing the firmware to restore to) it tells me that it is not supported. Can anyone help me? I tried to give as much information I could but still didn't cover everything I tried. I just want my phone back!! (Jailbroken with the latest software preferably.) upgrading5.1.1 upgradingios5.0.1 error21 iphone4s error3194 asked 12 Jun '12, 18:55 chris_wrather 25●1●1●4 Answers oldestnewestmost voted 1 your host file for windows has to be edited to remove tiny umbrella's settings so that it points at apples servers since 5.1.1 is still being officially signed by apple. guide to edit host files click here I would follow the manual method and NOT open tiny umbrella as that has caused issues. link answered 12 Jun '12, 18:59 EvlGns 10.5k●5●7 edited 12 Jun '12, 19:01 Thank you! I saw something similar to that on youtube but the guy talking sounded 12 and foreign so I wasn't about to trust him. This was a lot simpler than I was thinking it would be! (12 Jun '12, 19:51) chris_wrather Np glad to help (12 Jun '12, 20:15) EvlGns Your answer: (