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Discuss iPhone 3gs restore error at the iPhone 3GS - Hackint0sh.org; Originally Posted by n1ckn4m3 I'm still reviewing, but initially, Error 20 is usually related to ...
  1. #11
    j4l
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    Quote Originally Posted by n1ckn4m3 View Post
    I'm still reviewing, but initially, Error 20 is usually related to network security software or virus detection / malware detection software interfering with the restore process. Take a quick peek here while I'm still digging to see if this can help:

    iTunes for Windows: Troubleshooting security software issues

    A lot of other people with the same errors (Error 20 / Error 1604) can be resolved by switching computers, switching USB ports on the computer, or switching cables that you're using to sync. Back when 3.0 came out, a lot of cheap cables that people got from Meritline were unable to restore 3.0 to their phones, even though they worked for everything else. Try a different USB port, cable, or computer and let us know as well.
    I'm not getting error 20 and error 1604 - it's error 21 that i'm getting...


  2. #12
    Super Moderator Array n1ckn4m3's Avatar

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    Yeah, I mistyped. It happens. I meant 21 in the post, the suggestion should still be valid. Check for interfering virus/malware/network software, and if that doesn't work, check the cabling and USB ports.

    Error 21 also can mean you are in recovery when you need to be in DFU, but based on your description of the problem, I don't think that can be the case -- you'd have something on the screen, etc.

    Last but not least, some people using Windows have reported success in bypassing the Error 21 by making an entire new user on their machine, logging in as the new user, and connecting to iTunes and doing the restore as the new user.

    Give it a shot and let us know.
    Last edited by n1ckn4m3; 09-07-2011 at 11:44 PM.
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    j4l
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    Quote Originally Posted by n1ckn4m3 View Post
    Yeah, I mistyped. It happens. I meant 21 in the post, the suggestion should still be valid. Check for interfering virus/malware/network software, and if that doesn't work, check the cabling and USB ports.

    Error 21 also can mean you are in recovery when you need to be in DFU, but based on your description of the problem, I don't think that can be the case -- you'd have something on the screen, etc.

    Last but not least, some people using Windows have reported success in bypassing the Error 21 by making an entire new user on their machine, logging in as the new user, and connecting to iTunes and doing the restore as the new user.

    Give it a shot and let us know.
    OK thanks - i'll give ur suggestions a try - but i have tried it on another machine but with the same error, anyhow i will try creating a new user account on windows and see what happens

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    j4l
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    Quote Originally Posted by j4l View Post
    OK thanks - i'll give ur suggestions a try - but i have tried it on another machine but with the same error, anyhow i will try creating a new user account on windows and see what happens
    No luck With this one either - it looks like a hardware problem ive given up. Thanks for ur help anyway

 

 
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