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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone 2 / iPhone 3G / iPhone 3GS

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Old 09-27-2012, 05:29   #1 (permalink)
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3gs version 6 downgrade to 4.1 -unknown error 20


3gs version 6 downgrade to 4.1 -unknown error 20
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Old 09-27-2012, 06:11   #2 (permalink)
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Quote:
Originally Posted by zone3 View Post
3gs version 6 downgrade to 4.1 -unknown error 20
1. Download Fix Recovery Here The Firmware Umbrella - TinyUmbrella(The Firmware Umbrella - TinyUmbrella)
2. Download zlib1.dll from Here zlib1.dll free download - DLL-files.com(zlib1.dll free download - DLL-files.com)
3. If u are fixing iphone 3gs open fixrecovery43 then put ur iphone 3gs in DFU Mode and let the command window do everything for u "NOTE" *If u are fixing iphone 3g open fixrecovery421 then put ur iphone in DFU Mode*
4.If u did everything correctly ur iphone 3g/gs should be in recovery mode "Its normal"
5.Then use iREB RC4 From here iH8sn0w.com(
http://ih8sn0w.com/index.php/products/view/ireb.snow) | Jailbreak your iPod touches and iPhones
6. Restore to 4.1 then u gonna get error "1015" download Tinyumbrella to kick out of recovery mode The Firmware Umbrella - TinyUmbrella (The Firmware Umbrella - TinyUmbrella)
7. Finally just jailbreak ur iphone and unlock if u want!

**THIS IS ONLY FOR iPHONE 3GS/G**
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Old 09-27-2012, 06:38   #3 (permalink)
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How to Fix Error “20″ On iPhone 3GS / 3G
Many comments from our readers complain about “Error 20″ that happened when downgrading from iOS 4.3.5 to iOS 4.3.4 or lower on iPhone 3GS / 3G so here is how to fix “Error 20″
1. Download Fix Recovery Here The Firmware Umbrella - TinyUmbrella

2. Download zlib1.dll from Herehttp://www.dll-files.com/dllindex/dll-files.shtml?zlib1

3. If you are fixing iPhone 3GS open fixrecovery43 then put your iphone 3GS in DFU Mode and let the command window do everything for you

NOTE: If you are fixing iPhone 3G open fix recovery 421 then put your iPhone in DFU Mode

Connect your iPhone to your computer.
Turn iPhone off.
Start iTunes.
Hold Power and Home buttons together for 10 seconds or so.
Release Power button but keep holding the Home button until your
computer recognizes a new USB device.
iTunes will now recognize your iPhone.

4. If you did everything correctly your iphone 3G/3GS should be in recovery mode “Its normal”

5.Then use iREB RC4 From here http://ih8sn0w.com/index.php/products/view/ireb.snow

6. Restore to 4.1 (http://www.****************s.com/all...-now.html)then you gonna get Error “1015″ (http://thefirmwareumbrella.********.com/)download Tinyumbrella to kick out of recovery mode

7. Finally just jailbreak(http://www.****************s.com/ios...all-guide.html) your iPhone and unlock(http://www.****************s.com/ios...all-guide.html) if you want!

**THIS IS ONLY FOR iPHONE 3GS/3G**
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Old 09-27-2012, 06:48   #4 (permalink)
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Quote:
Originally Posted by zone3 View Post
3gs version 6 downgrade to 4.1 -unknown error 20

bro your need dfu mode and flash now
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Old 09-27-2012, 08:42   #5 (permalink)
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bro using ireb to dfu mode and than restore it 100% ok
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Old 09-27-2012, 08:45   #6 (permalink)
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Quote:
Originally Posted by zone3 View Post
3gs version 6 downgrade to 4.1 -unknown error 20
only the way 3gs version 6 downgrade to 4.1:
build custom firmware for 4.1
DFU mode by iReb
restore
ok
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Old 10-08-2012, 17:11   #7 (permalink)
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does ireb supports dfu on ios6?
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Old 10-08-2012, 17:27   #8 (permalink)
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Quote:
Originally Posted by solderingiron View Post
does ireb supports dfu on ios6?
yes it do ....
ireb Port bootroom exploit in dfu mode so no need which version you are running on phone
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The Following User Says Thank You to Sitlay KING For This Useful Post:
Old 10-08-2012, 18:00   #9 (permalink)
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if you have shsh 4.1 use iFaith-v1.4.2
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