A. 준비물
1. 지폰 패치버전으로 모뎀 버전을 낮추는 어플
http://iphone-freak.com/en/page1/page1.html
2. 지폰 어플
http://download.ziphone.org/
3. 펌웨어 1.1.4
http://appldnld.apple.com.edgesuite.net/content.info.apple.com/iPhone/061-4313.20080226.Sw39i/iPhone1,1_1.1.4_4A102_Restore.ipsw
4. 아이튠 7.5
맥버전
http://theiphoneproject.org/index.php/downloads?func=fileinfo&id=10
윈도우버전
http://theiphoneproject.org/index.php/downloads?func=fileinfo&id=11
B. 작업순서
현재 상황이 2.0으로 업글을 해서 언 경우거나 다시 1.1.4로 내렸으나 전화가 작동 않되시는 분들인 경우에 한정해서 지침을 따라주세요
1. iTunes를 7.5버전으로 내립니다
윈도우 사용자는 iTunes 와 Apple Mobile Device Support를 언인스톨 해주세요
맥사용자는 터미널에서
/Applications/iTunes.app
~/Library/Preferences/com.apple.iTunes.eq.plist
~/Library/Preferences/com.apple.iTunes.plist
~/Library/Caches/QCCompositionRepository-com.apple.iTunes.cache
/Library/Receipts/iTunesAccess.pkg
/Library/Receipts/iTunesX.pkg
/System/Library/PrivateFrameworks/MobileDevice.framework
이걸 다 지워주시구요
컴퓨터를 리스타트 해주세요
2. 준비물의 아이튠7.5를 다시 깔아줍니다
3. 아이폰을 컴퓨터에 연결하시고 아이폰을 복구 모드 상태로 만드세요 그리고 아이튠을 종료시켜주세요
(홈 버튼과 슬립버튼을 계속 누르고 있으시면 꺼졌다가 켜졌다가 아이튠에 연결하는 아이콘이 나타난 상태입니다)
4. 첫번째 준비물인 지폰 페치버전을 다운받으시고 실행하셔서 Dowgrade baseband 와 Debug Boot를 선택해시고 시작을 누르시면
패치가 시작 됩니다 (특별히 베이스벤드를 지워 버리고 싶으시면 iErase를 선택해주시고요 - 굳이 필요가 없을 겁니다)
5. 정상적으로 완료가 되신 분들은 아이폰을 다시 DFU모드로 다시 만듭니다 이전이랑 다른 상태인데요 홈이랑 슬립버튼을 누르고 계시다가 화면이 까매지면 (7초내외) 슬립버튼을 풀어주시고 홈버튼계속 누르고 계시면 (10초추가로) 화면이 까만상태에서 아이튠이 복구모드로 들어왔다고 표시가 됩니다.
6. 맥은 옵션 윈도우는 Alt 키를 누른상태 에서 아이튠의 복구모드를 눌러주시고 펌웨어 1.1.4 를 선택하셔서 복구를 진행하세요..
7. 복구중에 1011,1013,1015 같은 에러는 정상입니다 그럼 문제가 없는 것 이고 이게 아닌 다른에러 1601,1602,1600 이나 20인 경우는 첨부터 다시 해보셔야 할겁니다
8. 다시 아이폰을 복구 모드로 만드세요 (아이튠은 꺼주시구요)
9. 지폰으로 언락과 엑티베이션 등등을 진행해주시면 되겠습니다
Downgrading 2.0 Firmware 1st generation iPhone 3.9/4.6 bootloader
This tutorial will teach you how to restore your iPhone to a functioning state. Thanks go out to crumpx (who has some Windows based notes here), and BigBoss (who has a Windows downgrade guide here), who provided help with the location of the various files that must be deleted, and the order of the overall process. There may be other ways to do this, but this is what worked for me.
When the next release of PwnageTool comes out it may render this method obsolete, but I don’t know for sure. You might also consider waiting for the new version of PwnageTool to come out as it may simplify this process.
This tutorial is for people with the first generation iPhone, running either the 3.9 or 4.6 bootloader, but who did NOT use PwnageTool to install and run Boot Neuter, or the Installer to install and run Boot Neuter on their iPhone.
Step 1.
Open a Finder window and go to your Music folder and rename the iTunes folder to iTunes backup. This is so you can keep your music, and movies, et cetera, safe during this process.
Step 2.
Download and install AppZapper. Note: you don’t have to use AppZapper, you could manually delete the below listed files. ~ represents your user directory on your computer.
Once the program is installed and launched, drag the iTunes application icon from your Applications folder onto the AppZapper program screen.
Once you do this it will list several components that need to be uninstalled, so uninstall them by clicking the Zap button.
If you’d like to delete these files manually, here they are:
/Applications/iTunes.app
~/Library/Preferences/com.apple.iTunes.eq.plist
~/Library/Preferences/com.apple.iTunes.plist
~/Library/Caches/QCCompositionRepository-com.apple.iTunes.cache
/Library/Receipts/iTunesAccess.pkg
/Library/Receipts/iTunesX.pkg
This next folder must be deleted manually (even if you used AppZapper). You will need to enter your system password to delete it since it is a framework.
/System/Library/PrivateFrameworks/MobileDevice.framework
Step 3.
Reboot your Mac.
Step 4.
Click here to download iPhone firmware 1.1.4. Do NOT decompress this ipsw file.
Step 5.
Click here to download iTunes 7.5 from Apple directly.
Install iTunes 7.5.
Launch iTunes and set your preferences in the set up assistant.
Step 6.
Plug in your iPhone (which should still be at the activation screen - showing the USB cable pointing to the iTunes logo). You should get this pop up now.
Put the iPhone into DFU mode. Press and hold the Home and Sleep/Wake buttons for 10 seconds. At this point the screen will turn black, and the iPhone will appear to be off.
Continue holding the Home button until a recovery mode graphic pops up via iTunes, then let go of the Home button. You may need to try this more than once if you don’t get the recovery mode pop up the first time. It happens, just try again.
Option click the Restore button in iTunes.
Navigate to where you saved the 1.1.4 firmware, select it and click Open.
After the restore is complete you will get a 1015 error most likely. This is normal.
You should now see the old plug into iTunes logo on the iPhone which shows the iPhone end of the cable pointing at the iTunes logo. Close iTunes.
Step 7.
Read and perform my PwnageTool tutorial here.
When you get to Step 5 of this tutorial, do not check any of the boxes (like in the screen shot) except Activate phone (as seen below).
At the end of the PwnageTool tutorial you will have flashed your own custom 1.1.4 firmware back to the iPhone. You will also be activated and jailbroken. You will not have a cellular signal yet because you are still running 04.05.04_G baseband.
Step 8.
I have only found one method for downgrading the baseband easily. I
have done this myself twice with no ill side effects, yet… This program
calls itself a “patched” version of 
, but it is NOT the actual program. It will only downgrade your baseband, it will not do ANYTHING else.
I do not endorse the use of the actual program as it has harmed more iPhones than anyone can count (regardless of what its creator claims). To read more about the DANGEROUS side effects of this program, read this.
You use this patched program completely at your own risk.
The program can be downloaded here.
You can read a thread discussing this program here.
All you have to do is check the box for Baseband downgrading, then click the Start button.
It will finish in about three minutes. You should now have a cellular signal again. You will be on 1.1.4 firmware, but you will have 1.1.3 baseband (04.03.13_G). You could restore the iPhone again back to 1.1.4 to put the correct baseband on, but you don’t have to.
Step 9.
Update iTunes to version 7.7 (or newer). Just before launching iTunes 7.7, rename your iTunes backup folder to iTunes. This will let iTunes 7.7 see your music collection again.
Step 10.
Plug your iPhone back in to iTunes and you should see this pop up. Click Don’t Install! You want to put 1.1.4 baseband back on the phone (but you don’t have to).
Option click the Restore button and select the original 1.1.4 firmware. If you attempt to do this while in DFU mode you will get error 1600. You can then use iLiberty+ to jailbreak, activate and unlock your iPhone. You can read this tutorial if you don’t know how to use iLiberty+, or where to find it.