If you get error 20 you are not in restore mode on your iPhone. Follow the directions and try it again.

Does anybody know what error code 1604 means. I keep getting it no matter what I try. I have even put iTunes back to 7.7 and then updated the iPhone to fresh then started the whole process again downgrading to first 7.64 then 7.5 and doing the restore but it starts the process then stops giving me error code 1604! This is very frustrating - I know I’m in DFU mode as ZiPhone tells me it is if I try using that app (I was desperately trying anything after about 15 attempts, obviously didn’t work either)

If you get error codes 16xx like 1604, try everything on a fresh (different) PC. First make sure you install iTunes 7.7 because you need its baseband drivers, then uninstall it (the drivers will remain). Then install iTunes 7.6/7.5 and try again. Since your iPhone has upgraded its baseband revision, you need the 7.7 drivers to recognize it. iTunes 7.6/7.5 won’t recognize the newer baseband without the 7.7 drivers so you will get 16xx errors.

Uninstall your ITunes completely, Go into ITunes folder or to Music folder and delete file named “ituneslibrary.itl” or the whole ITunes folder , after that install fresh version of ITunes 7.5 or 7.6

Sam I am doing unlocking with another phone now so here step by step as I do it I type : if you dont have a BLACK screen you are not in Recovery Mode, if you see ITunes and cables no your screen it is not what you want, you need totally black screen. Do this connect it to Itunes 7.5, Turn it of completly by holding Power Button. Now Hold Home button and also hold power button for 10 seconds ( exactly 10 sec no more), afte 10 sec release power button but keep holding HOME button, in 5 sec you will hear Itunes detecting Iphone, Now do STEP 3 on top, download filmare 1.1.4 provided link above, and in Itunes select Shift+Restore button in Itunes and locate this 1.1.4 filmware. At the end you will get Error 1015. Now go to ZiPhone and go to Advanced Features( in left bottom conner) click on Downgrade Bootloader and click Perform Action ( you’ll see text running on your Iphone now and wait for 5-7 min, if nothing happens you will have to start all over by restoring to 1.1.4 doing Shift+Restore and selecting silmware 1.1.4 file on your PC.
After you Downgraded Bootloader , select Do it All !!! in ZiPhone and wait for it to complete. Once it completed you will see your Iphone main screen and it is UNLOCKED completly. Good Luck !

thanks .tree days i try to downgrade .yoy are the best

Hey thanks for all your help YT!

YT - your step by step instructions are so good, even a luddite like me managed the downgrade and re-unlock. I’ll get you an ale if ever our paths cross, Happy Days!!!

YT, thanks very much for your help. Unfortunately after having followed your instructions and “downgrading bootloader”. A message immediately comes up. “‘Ziphone V3.0 has stopped working’ - a problem caused the program to stop working correctly. Windows will close the program and notify you etc….” I am just wondering if my copy of Ziphone is corrupted? Any more suggestions? Thanks again

Try uninstalling and deleting Ziphone folder completly and reinstalling it again.

Thanks YT, It was a problem with encrytion when unzipping Ziphone. Did it on my wifes computer and all is working OK - I just dont get the Network. Seems that others have had the problem so will go and look at their solutions before bothereing you again. Thanks again Mark

Hey guys,
Being a dumbf***, I did the same, as it seems, did most of you. My brain said stop but the finger had too much inertia!!!
The whole description eventhough well intentioned, for idiots like me is still unclear – I have spent hours trying to resolve the problem. The only thing that kept me from throwing my iPhone against the wall was the fact that so many of you were successful.
In the end I was too!!!!
I have written the whole procedure I went through down. So next time I’m stupid, I don’t have to spend 10 hrs unblocking the phone. Hope it helps some of you. Thanks again to YT for his help when I was struggling.
1) First you have to downgrade iTunes to at least 7.6.2.9., Its available above (do yourself a favour and save it – you might need it again. While you are at it download 1.1.4 and kIREmK 04.05.04.zip as well. Save it to a folder that you will be able to find later.
2) Go to your music folder and delete all iTunes related libraries folders & files (*.itl). If you don’t . iTunes will not open, telling you that the libraries were created in a newer version.
3) Now download iTunes 7.6.2.9 or earlier.
4) Before you continue make sure iTunes is up and running.
5) Now take your iPhone and connect it to your computer. You should hear the beep telling you it is connected. It might tell you that it has detected an iPhone in recovery mode – close this or any other message that appears.
6) Now press the power button (the one at the top) down until you get the “power off” command.
7) When the screen has gone black, press the power button and the home button together and hold them for 8 – 10 secs, then release the power button while continuing the home button. (If the screen lights up with anything you have held both buttons too long – start again). Some computers give you a message that you are in DFU mode, but others may not. You will however get a beep and the Iphone screen will remain black.
8) You will then get a message that the Iphone needs to be restored.
9) Press shift and then double click the restore button on the screen. Your file menu will appear on the screen. Find where you saved the “1.1.4.zip” and double click it. 1.1.4 it will now download on to your phone – you will see the files being transferred.
10) After they have been transferred you may get a “1015” error. Now down load the file a 2nd time. When the error comes up again go to Ziphone.
11) In Ziphone click the do it all button. You will writing scrolling on your iPhone. This should last a few minutes and your phone will be unlocked.
12) In my case I had to go a few steps further as the phone would not pick up the cell phone net work.
13) Go to Ziphone – Advanced Features. Make sure your phone is connected and recognised by iTunes and select “Downgrade bootloader” – perform actions. Again writing will scroll on your iPhone.
14) I then had to run kIREmK 04.05.04.zip. Select “downgrade baseband” and “debug Boot” then click Start. Writing will scroll again. When it has finished you should be up and running.
Good Luck

i downloaded 7.5 but it still says that my itunes cannot read my iphone

JEANETTE if you dont have a BLACK screen you are not in Recovery Mode, if you see ITunes and cables on your screen it is not what you want, you need totally black screen. Do this connect it to Itunes 7.5, Turn it of completly by holding Power Button. Now Hold Home button and also hold power button for 10 seconds ( exactly 10 sec no more), afte 10 sec release power button but keep holding HOME button, in 5 sec you will hear Itunes detecting Iphone.

Hi, I have followed the instruction above however every time I go into itunes I keep getting an error “the iphone update server could not be contacted. An unknown error occurred (-185) can you please help me.

Thank you

John

What version of Itunes are you using ? You dont need to update your Iphone from Itunes server, you have to manually update it to 1.1.4 from Itunes version 7.5, download filmare 1.1.4 provided link above, and in Itunes select Shift+Restore button in Itunes and locate this 1.1.4 filmware. See my comments above.

I am trying to downgrade from v2 to 1.1.4. I have downlaoded and installed your ITunes 7.6.2.9 version as instructed. My phone is in DFU mode, but when I plug it in I get an error message “iPod software update server could not be contacted. An unknown error occured (-185). What am I doing wrong?

I ought to point out that I am like John above. I have downloaded the firmware, but not Restore button is there to get the menu. It does not see the phone, and I am in DFU as I said before.

Install Itunes 7.5 not 7.6. Here step by step as I do it I type : if you dont have a BLACK screen you are not in Recovery Mode, if you see ITunes and cables no your screen it is not what you want, you need totally black screen. Do this connect it to Itunes 7.5, Turn it of completly by holding Power Button. Now Hold Home button and also hold power button for 10 seconds ( exactly 10 sec no more), afte 10 sec release power button but keep holding HOME button, in 5 sec you will hear Itunes detecting Iphone, Now do STEP 3 on top, download filmare 1.1.4 provided link above, and in Itunes select Shift+Restore button in Itunes and locate this 1.1.4 filmware. At the end you will get Error 1015. Now go to ZiPhone and go to Advanced Features( in left bottom conner) click on Downgrade Bootloader and click Perform Action ( you’ll see text running on your Iphone now and wait for 5-7 min, if nothing happens you will have to start all over by restoring to 1.1.4 doing Shift+Restore and selecting silmware 1.1.4 file on your PC.
After you Downgraded Bootloader , select Do it All !!! in ZiPhone and wait for it to complete. Once it completed you will see your Iphone main screen and it is UNLOCKED completly. Good Luck !

Success Modembaseband Downgrade !
Thank you!!

YT - Thanks for the update - just one questions - where can i get iTunes 7.5 from. THis site offers 7.6

Just google it.
Try here http://www.arabdl.com/en/soft/download747.html

I am running itunes 7.5. When i put the phone in DFU mode i get a waiting for phone loader followed by a “Ipod could not be restored 1601″ error message.

Any ideas? Thanks

I am the same as Mark (above). I now have iTunes 7.5 and downloaded the 1.1.4 firmware. When I Shift + Restore it brings up Frimware folder, then into all_flash subfolder and dfu folder. i click on a component and get a 1601 message.

No idea what to do now..I just have a very dead iPhone.

Correction to previous message - I get Unknown error (1403)

Mark you might have incorrect baseband, try to update your Iphone to 2.0 version by getting ITunes 7.7 latest version. This way you will update baseband to latest version also. After that uninstall Itunes 7.7 and install Itunes 7.5 and try this process again.

thank u everyone just unlocked my iphone frm 2.0 version to 1.1.4…..really thanku….

tried restoring my iPhone 2.0.0 to 1.1.4 but says I’m in recovery mode but error message appears(20) and sometimes (-1) cannot get it back to 1.1.4 I use ziphone to put it in dfu, recovery. And normal mode but doesn’t even do that please help me I’m very pissed off I think it happen. When I pawned 1.1.4 than restored it with2.0 please helpme

Im getting a 1604 error message!I have iTunes 7.5 and am trying to downgrade to 1.1.4 but this error keeps popping up “The iPhone “iPhone” could not be restored. An unknown error has occurred (1604)” Can someone please help me…?

I originally had 2.0.1 firmware and downgraded yesterday to 2.0. Now its not allowing me to downgrade to 1.1.4 and i am doing all the steps from above. Thx in advance for any help

raymundo, if you get error 20 you are not in recovery mode, CABLE and ITUNES picture is not what you need, the screen must be totally black. I have instruction on top, here they are again :

if you dont have a BLACK screen you are not in Recovery Mode, if you see ITunes and cables no your screen it is not what you want, you need totally black screen. Do this connect it to Itunes 7.5, Turn it of completly by holding Power Button. Now Hold Home button and also hold power button for 10 seconds ( exactly 10 sec no more), afte 10 sec release power button but keep holding HOME button, in 5 sec you will hear Itunes detecting Iphone, Now do STEP 3 on top, download filmare 1.1.4 provided link above, and in Itunes select Shift+Restore button in Itunes and locate this 1.1.4 filmware. At the end you will get Error 1015. Now go to ZiPhone and go to Advanced Features( in left bottom conner) click on Downgrade Bootloader and click Perform Action ( you’ll see text running on your Iphone now and wait for 5-7 min, if nothing happens you will have to start all over by restoring to 1.1.4 doing Shift+Restore and selecting silmware 1.1.4 file on your PC.
After you Downgraded Bootloader , select Do it All !!! in ZiPhone and wait for it to complete. Once it completed you will see your Iphone main screen and it is UNLOCKED completly. Good Luck !

Serge, why dont you unlock 2.0 version, follow this process http://www.coderetard.com/2008/07/22/how-to-install-iphone-v20-firmware-with-pwnage-20-ipsw-on-windows/

guys i unlocked the phone but not getting network wat to do ? plz help

Call your phone service provider and ask them to add Internet access ($$$), Wi-Fi should work in Hot Spots only.

Tested and confirmed to work on firmware version 2.0.1 with a first generation iPhone.

worked perfectly! Good JOB

can anyone help me with the error(-185) m not able to restore my phone in 1.1.4 version

The iTunes 7.6.2 wouldn’t open because the library was made wit ha new iTunes…
What to do????

YT you are the best man. I used to get unknown error 20 when downgrade from 2.0 to 1.1.4 but i just follow your steps and now I do have 1.1.4 thanks alot man.

yo..ya the best

Noam , uninstall ITunes 7.6.2 version, then go to your Itunes folder and delete it completly, after that install earlier version of Itunes.

After a few tries I seemingly managed to get the phone unlocked the Ziphone software went through the “do it all” process and confirmed that the phone was unlocked. I managed to sync the phone with itunes and was even able to connect to the internet through my router. However, my friend’s t-mobile sim card does not seem to work with the unlocked iphone. And I am not sure why. Is there an extra step that I know about? Please let me know.

I downgrade from 2.0 to 1.1.4 and everything is working well. the only thing is that I don’t know how to get the ibrick app. I tried from differents ways but nothing is working, I used ziphone to unlock my iphone any idea pleseeeee help. I want to install some games in my iphone.

Uhm It wont let me delete the .itl

it keeps coming back!

Everytime I close iTunes and delete all the files. They regenerate and it claims the .itl file is in use…I cant delete it because it keeps regenerating when I start the iTunes program…Help

The instructions are great, but before I do any of this, I just have one small question.

After I uninstalled the new version of iTunes and downloaded the version you said, I noticed that I still have the back up file of my iphone in the preferences tab. For example, open i-tunes, go to Edit, then preferences, then Syncing, I see in the box it says “the following iphones and ipods are backed up on this computer.” Of course the backed file got there when I upgraded to v.2 of the iphone (i am really regretting this and I’m glad I found your step by step instructions). Anyways, should I just delete that backed up file or leave it there? I’m surprised it stayed there b/c I uninstalled the newest version of itunes and downloaded the version u suggested 7.5.0.20. Please respond soon, I really want to try this out and I hope it works. Thank you for everything!

when i did it i did not have a backup file so if you want to be sure just copy that file to a different location and then run through the steps. I dont think you can use that restore point any more so if you delete it, it wont make much of a differce

THXXXXX !!!!!
You’re so great guy’s I lost all hope of reusing my iPhone, thx to you all is working perfectly

pls help, i did everything as you say here,but when i press restore(with shift)and try to unpack 114 it says unknown error..????i have 2.1 software and i try to downgrade to 114…please help!!!

PLEASE HELP,
NO MATER HOW I TRY WHEN I START RECOVERING IT SAYS ,,CAN NOT BE RESTORED,, UNKNOWN ERROR(20)…

i was trying to unlock version 2.0 to 1.1.4 but while i was doing it the screen just suddenly blacked out and now i cant even turn on the phone. does anyone know why this has happened? can i still fix it or is it DEAD forever?

thanks to those who can help.

The 2.0′d 2G is a paperweight no longer, smooth and by the numbers. Totally owe you guys!!

Maybe it’s stuck in DFU mode? ZiPhone can kick it out of that state in the advanced options.

hi, i have 7.5 itunes and have downloaded the firmware from your site. question is that now when going in to itunes and doing Shift + Restore, what FILE do i select as its a folder with contents, Firmware1.4…. and then DFU and allflash BUT NO IPSW FILE. I am so lost now and frustrated as I clueless to what to do. PLEASE HELP ME….

MPower, are you on Windows or Mac?