Cant Restore Iphone 4 Error 21
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Iphone Restore Error 21 Battery
8, 16, or 32 GB capacity / Model A1332 / Black and White. iphone 4 restore fail 3122 Questions View all Clew Rep: 781 iphone restore error 21 fix 2 2 1 Posted: 03/05/2012 Options Permalink History Subscribe Unsubscribe iPhone4 won't restore and shows Error 21 My phone won't turn on, but shows the Apple logo when I plug it in (either to the wall charger or the computer). Then, how to restore iphone 4 without itunes it goes to the Connect to iTunes screen and when I connect it to iTunes it tells me that I need to restore the phone. It will get all the way to "preparing iPhone for restore" then will say, "The iPhone could not be restored. An unknown error occurred (21)." I tried to disable my computer security, but it did the same thing. Does anyone know what else I could do to fix it? Please help! Answer this question I have this problem
How To Restore Iphone 4 Without Passcode
too Subscribed to new answers Is this a good question? Yes No Voted Undo Score 65 Cancel Comments: my iPhone does the same thing 12/27/2014 by imani I just had this error, I removed screen, changed battery for another one from a spare phone, connected old screen back on, and YES no more error 21, phone restored fine and working without problem. 01/06/2015 by jeffa ps old battery ribbon connection was damaged. 01/06/2015 by jeffa my phone restore, keep getting Error YES no more error 21, phone restored 04/22/2015 by Ankit Gupta i need help mine does the same thing and it gets me so frusturated ive tried everything to restore it but nothing. please help!!! 04/26/2015 by karisma alvarez bro,my phone does the same exsact thing !!! its making me really mad doe 05/04/2015 by zenella garcia It worked but now it won't swip open the screen. 05/16/2015 by Maria Cotto Yes it worked, but now it won't swip open the screen. 05/16/2015 by Maria Cotto its nots working. it keeps doing it. 06/23/2015 by cheyeneham9761 Remove the battery and leave the phone for 2 minutes. Put the battery back, connect the phone to iTunes and restore. It worked for me. I guess the phone needed a complete hard reset. 06/24/2015 by Neo All you need to do is get a new battery :). Hope this solved some problems :) March 19 by SweetCandyCane All you need to do is replace the battery
not post a blank message. Please type your message and try again. _Alama_ Level 1 (0 points) Q: Can "unknown error 21" be fixed ?? (iphone 4) Recently my iPhone 4 just reset itself out of nowhere and wouldn't turn back on. I placed it on a how to restore iphone 4 to factory settings dock & the connect to itunes screen showed up. I plugged it into my computer and how to restore locked iphone 4 when it began to restore it stopped and the unknown error 21 window popped up. This has occured on 3 different computers &
How To Restore Iphone 4 Without Updating
now I'm unsure how to handle this. -Please help. iPhone 4, iOS 6 Posted on Jun 20, 2013 1:54 PM I have this question too Close Q: Can "unknown error 21" be fixed ?? (iphone 4) All replies Helpful https://www.ifixit.com/Answers/View/81953/iPhone4+won't+restore+and+shows+Error+21 answers Page 1 Next by KiltedTim, KiltedTim Jun 20, 2013 1:59 PM in response to _Alama_ Level 9 (55,790 points) Mac OS X Jun 20, 2013 1:59 PM in response to _Alama_ http://support.apple.com/kb/ts3694#error21Error 20, 21, 23, 26, 28, 29, 34, 36, 37, 40These errors typically occur when security software interferes with the restore and update process. FollowTroubleshooting security software issues to resolve this issue. In rare cases, these errors may be a hardware issue. If the errors persist on https://discussions.apple.com/thread/5118033?tstart=0 another computer, the device may need service.Also, check your hosts file to verify that it's not blocking iTunes from communicating with the update server. See iTunes: Advanced iTunes Store troubleshooting--follow steps under the heading Blocked by configuration (Mac OS X / Windows) > Rebuild network information > Mac OS X > The hosts file may also be blocking the iTunes Store. If you have software used to perform unauthorized modifications to the iOS device, uninstall this software prior to editing the hosts file to prevent that software from automatically modifying the hosts file again on restart. Helpful (0) Reply options Link to this post by simonege, simonege Sep 3, 2013 7:03 AM in response to _Alama_ Level 1 (0 points) Sep 3, 2013 7:03 AM in response to _Alama_ Did you solve it? I have the same problem with my ipad 2. Helpful (0) Reply options Link to this post by OnceUponAnAppleCare, OnceUponAnAppleCare Mar 17, 2014 1:32 PM in response to _Alama_ Level 1 (0 points) Mar 17, 2014 1:32 PM in response to _Alama_ Typically Yes That k-base document will resolve, OR at least help....This is how you see if it is your computer software causing the issue OR if it is the battery in your unit. attempt to restore the device, when you recieve error 21 (unable to restore "device" unknown error occured 21)make sure your device has been plugged i
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 http://jaxov.com/2011/03/how-to-fix-itunes-error-21-during-custom-ipsw-restore/ 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 http://anditsfixed.blogspot.com/2012/10/solved-itunes-error-3194-error-21-and.html LinkedIn Jailbreaking your iPhone, iPod Touch or iPod using custom IPSW made by PwnageTool or Sn0wbreeze requires a full firmware restore using iTunes. During the restore process, if you encounter Error 21, it means that you are trying to restore iphone 4 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 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 restore iphone 4 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. Please reinstall iTunes. (-42037)” How to Enter DFU Mode With Broken Home Button How to Fix iPhone Boot Loop Issue 116 comments Click here to cancel reply. Leave a message... your details Notify me of followup comments via e-mail. You can also subscribe without commenting. kimani • 9 months, 4 weeks ago does this error 21 have anything to do with the battery Reply → Eghosa Igiebor • 10 mError 3194, Error 21 and Error 1013 I finally found a few ways to resolve this after searching on Apple's support page and other sites. I also came to the conclusion that the error 3194 in iTunes and the other errors are quite common and luckily quite simple to isolate to then resolve. Now the key here is isolate. Try one step at the time, don't overdo it. Note for Jailbreak and Firmware Downgrade. If your issue is unrelated to Jailbreak or Downgrading a device then skip this section and move on to the next one. This guide is not intended for downgrading or Jailbreaking, and while the info provided may still be useful it may not apply to your case. So unless you're trying to restore your iOS device to the latest version of iOS this guide may not be for you. Comments regarding this error while jailbreaking or using a software version other than the latest one will be ignored. What causes the error? The error 3194 happens when iTunes tries to validate the downloaded restore file (.ipsw) and is unable to reach Apple's validation servers. The reason is usually something blocking the connection. Other causes are to try to use a firmware version that Apple is no longer signing ie. 5.1.1. So basically you can't use an older firmware unless you work around the security that Apple has put in place. This article does not cover bypassing these security restrictions. Common causes are: Firewall (try to disable it and attempt restoring again) Antivirus (try to disable it and attempt restoring again) Hosts file blocking access to the validation server. (keep reading for help with these) Stubborn computer (By all means try a different machine if you've tried everything here). Try this on a Mac (iTunes works almost flawlessly when used on a Mac) In OS X the error shows as: "The iPhone "name" could not be updated. This device isn't eligible for the requested build." OR "The iPhone "name" could not be restored. This device isn't eligible for the requested build." In Windows the error is even less descriptive: "The iPhone "iPhone" could not be restored. An unknown error occurred (3194). Fixing error 3194 in iTunes Quit iTunes Download TinyUmbrella. (download links on the sidebar of their site) Backup links: (Please check the official website for the latest version) TinyUmbrella for Windows 5.10.14 TinyUmbrella for OS X 5.10.14 Open TinyUmbrella (It requires admin account on the computer) Select your iPhone and then click on the "Advanced" tab. Untick the box "Set Hosts to Cydia on Exit (If you need a clean restore from Apple uncheck this box)" as seen on the screenshot below. Apply the changes. What TinyUmbrella ach