I am getting error 21 while following the recovery process.

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Level 1

8 points

I am getting error 21 while following the recovery process.

Dear All, I have an iPhone 4 that was functioning normally until Thursday evening. On Thursday evening the phone battery got exhausted and so I put it on charge. After sometime I noticed a gray screen with iPhone written on it. This was a new screen never saw it before. Upon unlocking the screen I got another new screen which said connect to iTunes. So, I connected to iTunes, but it wont detect my iPhone now.

I tried to put my iPhone in recovery mode as stated in one of the articles on apple support website but got error 21. I tried by disabling anti-virus and windows firewall but it still gives error 21.

Has anyone faced this problem? Any way to solve it?

iPhone 4, Windows XP

Posted on Jun 16, 2012 6:31 AM

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Answer 1

Rudegar

Level 10

180,270 points

Jun 16, 2012 7:52 AM in response to RKhanna79

tried one of these guides look from the number of hits for the search you're not the fist one

https://www.google.dk/search?source=ig&hl=da&rlz=1G1TSEH_ENDK367&q=iphone+restor e+error+21&oq=iphone+restore+error+21&aq=f&aqi=g1g-K9&aql=&gs_l=igoogle.3..0j0i3 0l9.2683076.2685846.0.2686852.16.10.0.6.6.0.179.988.8j2.10.0...0.0.wG86thobXH4#h l=da&gs_nf=1&pq=iphone%20restore%20error%2021&cp=25&gs_id=8&xhr=t&q=iphone+resto re+error+21+solution&pf=p&sclient=psy-ab&rlz=1G1TSEH_ENDK367&oq=iphone+restore+e rror+21+s&aq=0L&aqi=g-L1&aql=&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.r_cp.,cf.osb&fp= 2c3b173eb68e2e75&biw=1578&bih=763

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Answer 2

Jun 16, 2012 8:20 AM in response to RKhanna79

Here's what Apple says about that error: http://support.apple.com/kb/TS3694#error21

These errors typically occur when security software interferes with the restore and update process. Follow Troubleshooting 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.

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Answer 3

RKhanna79 Author

Level 1

8 points

Jun 17, 2012 10:13 AM in response to Lawrence Finch

Guys thanks for your reply. I tried some tips that came out of google search and also the apple support link. Nothing works. Error 21 keeps coming.

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Answer 4

Jun 17, 2012 1:41 PM in response to RKhanna79

If you have disabled security software and tried a different computer and the problem still exists your phone is broken. As in hardware failure.

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Answer 5

MikeLed

Level 1

0 points

Jan 2, 2013 11:16 AM in response to RKhanna79

I'm sure you have probably taken care of this by now, but I hought I would share with everyone else. I had this same problem when trying to update my iPhone. I ended up getting it to work by disabling LogMeIn. If you have any programs running in the background, I would try shutting them all down.

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