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  • Downgrade from 1.1.1 to 1.0.2 POSSIBLE NOW!
    KMAC over at hackint0sh has found a way to downgrade from 1.1.1 to 1.0.2. Here's the skinny:
    • Start iTunes and plug in your iPhone which is running the 1.1.1 firmware.
    • Hold down the Sleep and Home button for 10 seconds. Allow the phone to power off, but keep holding down the buttons. After 10 seconds, let go of the Sleep button, but keep the Home button pressed until iTunes sees your iPhone. The screen on your iPhone should be displaying nothing right now.
    • iTunes will ask you if you want to restorea. Hold down Option or Alt, I forget which (Shift if you are in Windows), and click restore. When iTunes asks you what file you would like to restore from, navigate to your 1.0.2 folder. You may have to rename that file to .zip and uncompress it. It will begin to restore.
    • When it completes, you will get an error. The iPhone will display the yellow triangle on the screen. Leave iTunes open, and run AppTapp. This may give you an error, but you should see the "Activate iPhone" screen after.
    • Run AppTapp again. If the iPhone isn't being recognized, restart the computer and then run AppTapp for the second time.
    • Congrats! You now have 1.0.2 again! iNdependence and all other modding apps will now work.
    This has been verified with iTunes 7.4.3.1.

    Wiki here.

    hackint0sh

    UPDATE: Not confirmed yet, but for those having the "incorrect SIM" issue after dowgrading, try this (thanks, Doerr)

    Just turn off the phone, take out the SIM card, turn it on, and when its done put it back in.
    This article was originally published in forum thread: Downgrade from 1.1.1 to 1.0.2 POSSIBLE NOW! started by Kyle Matthews View original post
    Comments 238 Comments
    1. Hackme's Avatar
      Hackme -
      no, when you downgrade you should only be doing it for 1 of 2 reasons
      -you want to be able to mod
      -your locked out with a bad IMEI
      when you downgrade to 1.0.2 the 1.1.1 features dont stay on the phone.
    1. mikef's Avatar
      mikef -
      well i figured that! i just wanna mod my **** again, but ive heard some horror stories about no wifi and another guy said his comes up with a sim error, and he had an att account. ILL WAIT.... no big deal
    1. tamasb's Avatar
      tamasb -
      Great!!!! You guys made my day!!!!
    1. Murfunit's Avatar
      Murfunit -
      Quote Originally Posted by Hackme View Post
      you need to use winstaller or something equivalent to bypass activation screen
      Ok dug out my copy of PACAY, took out my SIM so the IMEI reset to the true one and it orked

      Thanks
    1. DoerrFan's Avatar
      DoerrFan -
      This is a huge step, and i cannot thank the guy who did this enough!
    1. Murfunit's Avatar
      Murfunit -
      Quote Originally Posted by DoerrFan View Post
      This is a huge step, and i cannot thank the guy who did this enough!
      AMEN to that!!!!
    1. DoerrFan's Avatar
      DoerrFan -
      http://hackint0sh.org/forum/showthread.php?t=9027

      If this works, i am saved
      I will not be trying it out though, at least not until the Dev Team releases there tool to restore to a factory like state, or give the go that this method is safe.
    1. SiLeNtKiLLa's Avatar
      SiLeNtKiLLa -
      For you guys with the incorrect sim issues... my process has been confirmed here.. http://www.hackint0sh.org/forum/show...1&postcount=61 just upload the hacked lockdwnd file to your iPhone, and you should be in good shape.
    1. alcantara4's Avatar
      alcantara4 -
      found this on dev team site:
      http://iphone.fiveforty.net/wiki/ind...1.1.1_to_1.0.2
    1. dylan23's Avatar
      dylan23 -
      im not getting the yellow triangle. im getting a 30pin connector with an arrow pointing to the itunes icon

      what up with this?
    1. uPhone559's Avatar
      uPhone559 -
      i almost did this, but im really sick of restoring and most of the time i do i get a message "cannot restore iphone" and dont get my contacts loaded..... ;/
    1. gramirez's Avatar
      gramirez -
      I was able to restore back to the 1.0.2 image but now im on ATT and im getting Incorrect SIM This iPhone must be used with an approved SIM what do i need to do any help would be appreciated thanks in advance.
    1. millchen's Avatar
      millchen -
      i get an error in itunes and ist shuts down the phone please help
    1. SiLeNtKiLLa's Avatar
      SiLeNtKiLLa -
      Quote Originally Posted by gramirez View Post
      I was able to restore back to the 1.0.2 image but now im on ATT and im getting Incorrect SIM This iPhone must be used with an approved SIM what do i need to do any help would be appreciated thanks in advance.
      read back to the first page, my first post.
    1. larryblaw's Avatar
      larryblaw -
      Worked like a charm for me.
    1. gramirez's Avatar
      gramirez -
      well i did do that i downloaded the one from this site and used it but still says that incorrect sim too also i still have that 0000 imei when i check the about section but when i reboot with the sim out of it it goes back to normal
    1. Kyle Matthews's Avatar
      Kyle Matthews -
      Quote Originally Posted by mikef View Post
      so even if i am on att and never unlocked the phone this will work?? and i want to hear this from PF!!!!!! ive heard that wifi wont work?????????or is that with an unlock different sim?

      please make me a happy person and confirm this
      Yes, everything will work.

      Quote Originally Posted by mikef View Post
      i am on mac? could i use apptapp
      Yes.

      Quote Originally Posted by Hackme View Post
      Can someone tell me how to get the acutal phone part to start working after the downgrade? Everything works except for the phone part. I have att so i dont know what the problem is. I get invalid sim messages every time i start my phone. I tried anySIM but it gives me an error saying that my iphone firmware is already patched and then it closes.
      Install the modded lockdownd file into usr/libexec.

      Quote Originally Posted by SiLeNtKiLLa View Post
      I still have a slight understanding on the ending effect as I'm seeing mixed results... Are you guys still able to access the 1.1.1 features, but still under the 1.0.2 firmware after this proccess??
      No. Just downgrades for modding purposes.

      Quote Originally Posted by dylan23 View Post
      im not getting the yellow triangle. im getting a 30pin connector with an arrow pointing to the itunes icon

      what up with this?
      You are not doing the button combination in the correct order. Hold down both buttons for 10 seconds, then let go of the Sleep button (top button) until iTunes sees the iPhone. Then let go. It should be blank screen on the iPhone, then you can proceed.

      Quote Originally Posted by gramirez View Post
      I was able to restore back to the 1.0.2 image but now im on ATT and im getting Incorrect SIM This iPhone must be used with an approved SIM what do i need to do any help would be appreciated thanks in advance.
      Quote Originally Posted by gramirez View Post
      well i did do that i downloaded the one from this site and used it but still says that incorrect sim too also i still have that 0000 imei when i check the about section but when i reboot with the sim out of it it goes back to normal
      Right. You have to do this with the SIM out if you have unlocked the iPhone previously.
    1. ufmedrudy's Avatar
      ufmedrudy -
      Wow you all are desperate
    1. gramirez's Avatar
      gramirez -
      So....im getting the same result i put the modded lockdownd file without the sim card in there i reboot the phone and then put the sim card in and i still get the sim not being recognized... :-(
    1. JAYMONEY510's Avatar
      JAYMONEY510 -
      Quote Originally Posted by SiLeNtKiLLa View Post
      For you guys with the incorrect sim issues... my process has been confirmed here.. http://www.hackint0sh.org/forum/show...1&postcount=61 just upload the hacked lockdwnd file to your iPhone, and you should be in good shape.
      how do i do this on PC? I downloaded the file on my desktop and that's as far as i got.