An Unknown Error Occurred 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 turn back on. I placed it on a dock &
An Unknown Error Occurred 21 Itunes
the connect to itunes screen showed up. I plugged it into my computer and when it an unknown error occurred 21 iphone began to restore it stopped and the unknown error 21 window popped up. This has occured on 3 different computers & now I'm unsure how
An Unknown Error Occurred 21 The Iphone Could Not Be Restored
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 answers Page 1 Next by unknown error occurred 1600 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 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 an unknown error occurred 3194 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 in long enough to recieve some sort of charge. ( computer, dock, charger make
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The Ipad Could Not Be Restored An Unknown Error Occurred 21
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Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring http://apple.stackexchange.com/questions/74951/iphone-5-cant-restore-even-when-using-dfu-mode developers or posting ads with us Ask Different Questions Tags Users Badges Unanswered Ask Question _ Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Iphone 5 can't restore even when using DFU mode up vote 2 down vote favorite I unknown error got this AT&T iphone 5 purchased overseas for 800 dollars plus tax. As soon as I got it, I tried to restore it to bypass the activation screen required by at&t. But restoring didn't go smooth as planned. Now the phone is stuck in recovery mode. And every time I place it in dfu mode, then restore with itunes I get an error 21, if not in dfu mode 1603,1604, 1611 errors come out. When restoring using dfu mode, what I unknown error occurred notice is that, Itunes has the loading labeled preparing to restore iphone. The device on the other hand turns off, and comes up with the apple logo and the daisy/spinning wheel, the wheel spins for about a quarter only and get stuck, and soon after reboots and goes back to apple logo, after that is the popular itunes and usb logo.Then, itunes gives an "Iphone cannot be restored. An Unknown error occurred(21)" something error. The process repeats every time i try to restore in DFU mode. I've tried almost everything online, relating to this issue, device off and hold home button while connecting the lightning connector and wait for the itunes logo and usb to show up before releasing home button, for example. Done it for countless times, in 4 different computers. System specs of the computers i've tried it on, 2 pcs with windows 7 64bit, 1 mac book pro, 1 unit windows xp. The ipsw file i'm using is the 6.0.1 for GSM which is appropriate for my gsm device. Been stuck for almost a week now, will be really sad if this is a hardware failure, it would mean additional expense for warranty. Any other suggestions i should try? or better yet a fix? i really want to start using this device. iphone itunes ios restore share|improve this question asked Dec 15 '12 at 2:39 Wendyl 11112 add a comment| 3 Answers 3 active oldest