Error 21 Jailbreak 4.2.1
Jailbreak Developers iPhone Dev Team Saurik MuscleNerd Planetbeing Comex Pod2G P0sixNinja i0n1c iH8Sn0w GeoHot NotCom Jailbreak Guides iPhone Jailbreak Tutorials Jailbreak iPod Touch Jailbreaking Explained Cydia Jailbreak Software Sn0wbreeze Absinthe Blackra1n LimeRa1n JailbreakM Redsn0w Greenpois0n PwnageTool Seas0nPass iPhone Unlock Unlock iPhone Unlock iPhone 3Gs Unlock iPhone 4 Unlock iPhone 4s Ultrasn0w News IOS Wiki How to Fix iTunes Error 21 When Restoring custom IPSW File? Share on Twitter Share on Google+ Share on Facebook Share on LinkedIn Hello Jaxov, need help here. Few days back, I am trying to jailbreak my iPhone 4 on iOS 4.2.1 using Sn0wbreeze 2.5.1, but during the custom firmware restoration process, iTunes throws Error 21. This is a used iPhone 4 and it was jailbroken on iOS 4.3.1 using PwnageTool but the previous user said he did not encounter this error. What do I need to do to fix this error? My iPhone is dead. Please help, I’m a novice. Thanks in advance.Asked by: Patrick from Jersey City, New Jersey Hello Patrick, iTunes Error 21 occurs during the custom IPSW firmware using the recovery mode instead of the traditional DFU mode or Device Firmware Upgrade mode. So there’s a possibility that you may encounter Error 21 when you use PwnageTool or Sn0wbreeze jailbreak tools since these tools were used to create custom pre-jailbroken IPSW file, but chances to get error 21 is very low. By the way, are you planning to unlock your iPhone? Why do you have to use Sn0wbreeze or PwnageTool to restore a custom firmware? If you don’t care about unlocking your iPhone from AT&T then you can just jailbreak your iPhone 4 using Redsn0w 0.9.6rc12 on iOS 4.2.1 or Redsn0w 0.9.6Rrc16 on iOS 4.3.3.Anyway, to fix iTunes’ Error 21, you must put your iPhone (iPad or iPod Touch) into DFU mode. If you don’t know how to put your iOS device into DFU mode, then you can follow the step by step guide posted below:Step 1: Connect your iPhone (iPad or iPod Touch) to your Mac or PC via USB cable (USB cable) and then launch iTunes.Step 2: Then hold down the Home and Power button at the same time for 10 seconds.Step 3: Release the Power button after 10 seconds but continue holding the Home button and wait for iTunes to detect your iPhone in recovery mode.Step 4: Once your iPhone (iPad or iPod Touch) is in DFU mode, you
not post a blank message. Please type your message and try again. Bo98 Level 1 (10 points) Q: Error 21 (and 1600 in DFU mode) when updating/restoring to iOS 5.0.1 I am getting Error 21 when I update or restore my iPhone 3GS (currently at 4.2.1). I don't have any security software installed so that shouldn't be the problem. Trying to restore in DFU mode brings up an Error 1600 instead. I have also tried using a different USB port with no luck. I have tryed redownloading the update with still no luck. Also my iPhone is not and has never been jailbroken. Anyone got any ideas? iPhone 3GS, iOS 4.2.1 Posted http://jaxov.com/wiki/how-to-fix-itunes-error-21-when-restoring-custom-ipsw-file/ on Jan 1, 2012 8:04 AM I have this question too Close Q: Error 21 (and 1600 in DFU mode) when updating/restoring to iOS 5.0.1 All replies Helpful answers Page 1 Next by jk_baller23,★Helpful jk_baller23 Jan 1, 2012 8:14 AM in response to Bo98 Level 4 (2,129 points) Jan 1, 2012 8:14 AM in response to Bo98 I believe editing your host file should do the trick.change your hosts file line into:#74.208.10.249 https://discussions.apple.com/thread/3617189?tstart=0 gs.apple.com(that is: put the hash (#) before 74....) Helpful (1) Reply options Link to this post by Bo98, Bo98 Jan 1, 2012 8:17 AM in response to jk_baller23 Level 1 (10 points) Jan 1, 2012 8:17 AM in response to jk_baller23 There was a gs.apple.com in my hosts file but I still get the problem after commenting it out (even deleting it all together didn't work). Helpful (0) Reply options Link to this post by jk_baller23, jk_baller23 Jan 1, 2012 8:20 AM in response to Bo98 Level 4 (2,129 points) Jan 1, 2012 8:20 AM in response to Bo98 Did your phone have the connect to iTunes icon or was it still in DFU mode? Helpful (0) Reply options Link to this post by Bo98, Bo98 Jan 1, 2012 8:52 AM in response to jk_baller23 Level 1 (10 points) Jan 1, 2012 8:52 AM in response to jk_baller23 I get Error 21 through recovery mode and Error 1600 in DFU mode. Helpful (0) Reply options Link to this post by Bo98, Bo98 Jan 1, 2012 2:13 PM in response to Bo98 Level 1 (10 points) Jan 1, 2012 2:13 PM in response to Bo98 Anyone got any ideas? Helpful (0) Reply options Link to this post by ldjh1985, ldjh1985 Jan 1, 2012 2:2
Du siehst YouTube auf Deutsch. Du kannst diese Einstellung unten ändern. Learn more You're viewing YouTube in German. You can change this https://www.youtube.com/watch?v=OibqaOppdDk preference below. Schließen Ja, ich möchte sie behalten Rückgängig machen http://forums.macrumors.com/threads/help-jailbroken-iphone-4-wont-restore-error-21.1429204/ Schließen Dieses Video ist nicht verfügbar. WiedergabelisteWarteschlangeWiedergabelisteWarteschlange Alle entfernenBeenden Wird geladen... Wiedergabeliste Warteschlange __count__/__total__ [Tutorial] How To Bypass 1015 Error And Fix Recovery Mode Loops On 4.2.1 With 06.15.00 Baseband MrZackehhSoul AbonnierenAbonniertAbo beenden8.5598 Tsd. Wird geladen... Wird geladen... error 21 Wird verarbeitet... Hinzufügen Möchtest du dieses Video später noch einmal ansehen? Wenn du bei YouTube angemeldet bist, kannst du dieses Video zu einer Playlist hinzufügen. Anmelden Teilen Mehr Melden Möchtest du dieses Video melden? Melde dich an, um unangemessene Inhalte zu melden. Anmelden Transkript 7.067 Aufrufe 2 Dieses error 21 jailbreak Video gefällt dir? Melde dich bei YouTube an, damit dein Feedback gezählt wird. Anmelden 3 2 Dieses Video gefällt dir nicht? Melde dich bei YouTube an, damit dein Feedback gezählt wird. Anmelden 3 Wird geladen... Wird geladen... Transkript Das interaktive Transkript konnte nicht geladen werden. Wird geladen... Wird geladen... Die Bewertungsfunktion ist nach Ausleihen des Videos verfügbar. Diese Funktion ist zurzeit nicht verfügbar. Bitte versuche es später erneut. Hochgeladen am 27.02.2012Blog post here: http://adf.ly/5QsRD[UPDATE #1] When experiencing Error 21, use redsn0w 0.9.6b5 to "Just boot pwned DFU mode now", by selecting a 4.2.1 *STOCK* firmware then carry out your restore afterwards. [UPDATE #2} Use iREB RC3 from http://ih8sn0w.com if experiencing Error 1600-1604.Ok, so many of you have met the problem of recovery mode loops or a 1015 error in iTunes after you got the 06.15.00 custom baseband for your iPh
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