An Unknown Error Ocurred 21
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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 an unknown error occurred 21 itunes turn back on. I placed it on a dock & the connect to itunes an unknown error occurred 21 iphone screen showed up. I plugged it into my computer and when it began to restore it stopped and the unknown error 21 an unknown error occurred 21 the iphone could not be restored window popped up. This has occured on 3 different computers & 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 unknown error occurred 1600 too Close Q: Can "unknown error 21" be fixed ?? (iphone 4) All replies Helpful answers Page 1 Next by KiltedTim, KiltedTim Jun 20, 2013 1:59 PM in response to _Alama_ Level 9 (55,712 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
An Unknown Error Occurred 3194
process. FollowTroubleshooting security software issues to resolve this issue. In rare cases, these errors may be a hardware issue. If the errors persist on 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
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An Unknown Error Occurred 21 Iphone 4
Back to Answers Index 81953 iPhone 4 Fourth generation iPhone. Repair is straightforward, but the an unknown error occurred (21) iphone 5 front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / the ipad could not be restored an unknown error occurred 21 Black and White. iphone 4 restore fail 3121 Questions View all Clew Rep: 781 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, https://discussions.apple.com/thread/5118033?tstart=0 but shows the Apple logo when I plug it in (either to the wall charger or the computer). Then, 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 https://www.ifixit.com/Answers/View/81953/iPhone4+won't+restore+and+shows+Error+21 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 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
Error 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 http://anditsfixed.blogspot.com/2012/10/solved-itunes-error-3194-error-21-and.html 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 http://www.jailbreakqa.com/questions/154881/error-21 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 unknown error 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 an unknown error 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 achieves is to remove any
/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 21 0 It started with the apple logo just flashing on and off. So I went to reset my iPad by pressing the on/off button and the menu button simultaneously until the iTunes logo and the USB cable was shown on the screen. At that point, iTunes wrote; 'iTunes has detected an iPad in recovery mode. You must restore this iPad before it can be used with iTunes. I clicked 'OK' and then 'Restore'. ITunes then went on by 'extracting software...' for a minute or two and then 'Preparing iPhone for restore...' The apple logo was then shown on the iPad and a message box i iTunes; 'The iPad 'iPad' could not be restored. An unknown error occurred (21)' The message box leads to 'More Information' that says that the error 21 ' typically occur when security software interferes with the restore and update process' asked 15 Feb '13, 22:31 sophealane 11●1●1●2 what iOS are you trying to install ? (15 Feb '13, 22:38) WalterWhite Answers oldestnewestmost voted 1 Delete TinyUmbrella, it is obsolete and is also the cause of your problem. Remove any lines containing Apple in your hosts file by following these instructions: Windows: Close iTunes Start –> Programs –> Accessories Run Notepad or WordPad (as administrator on windows 7) Click “Open..” from File menu. Browse to Windows/System32/drivers/etc In "files of type:" select all documents Open "hosts" Either delete all line that has "gs.apple.com", or add a "#" sign at the beginning of the line to comment it out Hit Save Close and re-open your browser Visit http://gs.apple.com/ to verify that the hosts file is pointing to Apple and not Cydia. Restore your device. Mac OS X: On your Mac, go to your “Applications” folder. Now navigate to the “Utilities” folder. Launch "Terminal". Type "sudo nano /etc/hosts" (without quotes) and hit return. Enter your password Use the down arrow key to find the “gs.apple.com” entries. Once