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  • Jailbreaking & Unlocking iOS 4 : What You Should Know
    Note: This Post will be udpated as news becomes available. Please share your experiences in this thread. It is highly suggested you do not update to iOS 4 right away. Please be patient.



    Today, as expected, Apple released iOS 4 to the public. But before you get too excited, there are some things you should know before updating to iOS 4. If you want to play Jailbreak with your iDevice, make sure you read through this.

    iOS 4 is compatible with the 3G, 3GS, the newest iPod Touch and iPhone 4. Those of you that have played with the GM release, the build number on this public release is exactly the same; 8A293. So as for changes since the GM there are none in this release.

    Update:
    Quote Originally Posted by bennyg View Post
    there are actually differences in the GM and public release. Notice no game centre in the public release? Also if you go to http://oo.apple.com to opt out of the iAd data collection stuff on the GM release it states your not on iOS4!

    Jailbreaking

    iPhone3GS & iPod3G owners (especially if you used Spirit for your first JB) should stay away from iOS4 for now

    Wizdaz has kept the community in the know, informing us that PwnageTool is currently being updated as we speak. PwnageTool 4.0 will support the iPhone 3G (with Pwnage exploit), iPhone 3GS and iPod Touch 2G (both with 24kPwn exploit). Keep in mind this means no support for the newer bootom. Remember the tethered days? If that was you, then you will need to wait until Spirit is updated or a new tool is updated for such.

    There is of course the Redsn0w option if you have a 3G, but stay away from any custom packages. The Dev-Team has written it well, and because of their credibility, here is exactly what they say

    We are working hard on a release to our tools that will jailbreak your device (or give you iOS 4 via the jailbreak train) and provide you with a carrier unlock.

    Until these tools are released you should hold off on updating your device until we have fully tested our tools with all the relevant devices.

    If you rely on hacktivation or a carrier unlock (ultrasn0w) then you should not upgrade until we have fully tested and released our tools.

    Don’t be tempted with unofficial PwnageTool/redsn0w bundles or releases, just check here or our team twitter for real time release information.

    Remember, we risk our devices so you don’t have to (but this time anyone who has made a mistake upgrading their baseband firmware at 3.1.3 or 4.0 should be OK real soon Now!
    iPhone Dev-Team
    WizDaz


    Unlocking iOS 4

    The iPhone Dev Team has released ultrasn0w 0.93 for unlocking your new iOS 4. Simply add the Cydia repo: repo666.ultrasn0w.com. This version of ultrasn0w will unlock basebands 04.26.08 thru 05.13.04. If your unsure, that means that ultrasn0w unlocks ALL basebands since iPhone OS 3.1. Even more specifically, 04.26.08, 05.11.07, 05.15.01, and 05.13.04. Remember to disable 3G on T-Mobile USA.

    So on the unlocking front, you're pretty much golden. However it's still recommend to wait just a little bit longer before making the plunge for iOS 4.

    iPhone Dev-Team
    MuscleNerd
    This article was originally published in forum thread: Jailbreaking & Unlocking iOS 4 : What You Should Know started by nickhesson View original post
    Comments 470 Comments
    1. Borigol's Avatar
      Borigol -
      Why????
      Remember to disable 3G on T-Mobile USA.
    1. brett_day's Avatar
      brett_day -
      Quote Originally Posted by Inwood View Post
      Brett, how did you get multitasking working for the 3G on iOS 4? Apple specifically states that multitasking is not an available feature on the 3G.
      jailbreaking, you can enable multitasking and wallpapers
    1. mamirza's Avatar
      mamirza -
      Quote Originally Posted by brett_day View Post
      jailbreaking, you can enable multitasking and wallpapers
      Does multitasking and wallpapers make slow speed of 3G?
    1. brett_day's Avatar
      brett_day -
      Quote Originally Posted by mamirza View Post
      Does multitasking and wallpapers make slow speed of 3G?
      im okay with the speed, others are not, it will be a personal preference. There is slow down and some lag but it is usuable in my opinion and i like the features enough to keep it on
    1. DisturbedZen's Avatar
      DisturbedZen -
      Can iPhone 3GS on iOS 4.0 be unlocked?
    1. billinaz's Avatar
      billinaz -
      Quote Originally Posted by DisturbedZen View Post
      Can iPhone 3GS on iOS 4.0 be unlocked?
      Yes, assuming you are on the old bootrom, previously jailbroken.


      Several guides out there.

      Im running 4.0 on my 3GS
    1. beav626's Avatar
      beav626 -
      Quote Originally Posted by billinaz View Post
      Yes, assuming you are on the old bootrom, previously jailbroken.


      Several guides out there.

      Im running 4.0 on my 3GS
      i UNDERSTAND IT CAN ONLY BE DONE WITH A MAC AN PAWNAGE...
    1. mamirza's Avatar
      mamirza -
      After upgraded 3G to iOS4 it works but slower than of os 3.1.2 and some applications run sluggish and sometime does not exe, and return to home screen twice and third time iPhone restarts...

      So please suggest should I downgrade back to OS 3.1.2 if so pls help, guide and steps...and now the Modem FW 05.13.04

      Thanks
    1. DmVinny's Avatar
      DmVinny -
      Yea, iOS4 is buggy, and laggy... it needs work... So I downgraded to 3.1.2 and am happy using categories, and backgrounder... and still have plenty of memory free...

      Btw, anyone else noticed the memory leak in safari on iOS4?
    1. mamirza's Avatar
      mamirza -
      Quote Originally Posted by DmVinny View Post
      Yea, iOS4 is buggy, and laggy... it needs work... So I downgraded to 3.1.2 and am happy using categories, and backgrounder... and still have plenty of memory free...

      Btw, anyone else noticed the memory leak in safari on iOS4?
      Pls guide, steps how to downgrade to os 3.1.2

      Quote Originally Posted by mamirza View Post
      After upgraded 3G to iOS4 it works but slower than of os 3.1.2 and some applications run sluggish and sometime does not exe, and return to home screen twice and third time iPhone restarts...

      So please suggest should I downgrade back to OS 3.1.2 if so pls help, guide and steps...and now the Modem FW 05.13.04

      Thanks
      Anyone HELP !!!

      How to downgrade iOS4 TO OS 3.1.2