(win and mac)
EDIT: This guide will not work for iPhone 1.1.2. ONLY for iPhone 1.1.1 or lower.


Do not restore unless it’s really necessary. Make sure the iTunes did not going to download new firmware. And, make sure you does not select the new firmware 1.1.1 (File named ”) during the restoration.
Before:
Check your iPhone firmware first. You can check it by going from Settings > General > About.
You should read 1.0.2(1C28) under versions. If yes, you can continue.
If you cannot enter the phone, check it under emergency call by:
Pressing *3001#12345#* and press Call
If:
03.12.06_G is firmware 1.0.0
03.14.08_G is firmware 1.0.1 and 1.02
04.01.13_G is 1.1.1

For Mac:
1. Turn off the automatic update from iTunes > Preferences, un-tick ‘check for updates automatically’ from General tab.
2. Backup your existing iPhone firmware. For Mac, it is usually at ‘~\Library\iTunes\iPhone Software Updates’. Copy the ‘iPhone1,1_1.0.2_1C28_Restore.ipsw’ from the folder to somewhere else as backup, we recommend you to update the iPhone now before the new firmware released.
3. Restore your iPhone by press and hold ‘option’ key, then use the mouse to click ‘restore. You should now able to choose the backup iPhone firmware file ‘iPhone1,1_1.0.2_1C28_Restore.ipsw’ we did in step 2.
For Windows:

1. Prevent automatic update from iTunes. From the iTunes, choose ‘Edit > Preferences’, un-tick automatic update.
2. Backup your iTunes firmware from ‘C:\Users\[user name]\AppData\Roaming\Apple Computer\iTunes\iPhone Software Updates’. Change the part [user name] to your Windows’ user name. Copy ‘iPhone1,1_1.0.2_1C28_Restore.ipsw’ to somewhere else as backup. You need to restore your iPhone at least once, or otherwise nothing will be in there. We also recommend you to update 1.0.2 while new firmware is not released yet.
3. Restore your iPhone by press and hold ‘Shift’ key, than click ‘restore’ to select the file we copied in Step 2.
If you are lazy to find where is the iPhone firmware file, download it by clicking here.




Just FYI for your readers who are running Windows XP instead of Vista, the folder to look in is:
C:\Documents and Settings\[username]\Application Data\Apple Computer\iTunes\iPhone Software Updates
I did not sucseed with this guide.
I got this errormessage in iTunes when I tries to update the firmware.
“iPhone-unit “iPhone” could not he restored. A unknown error appeared (1)”
Please help me, what could I do to get it work?
/Michael Oberg
Michael,
What firmware are you currently in?
Admin: I have no idée the salesman said it was 1.0.2 but i think I got 1.1.1 because it don´t works.
I can´t get inside the phone and check.
Michael,
You can still check it by pressing *3001#12345#* and press Call
If you see:
03.12.06_G is firmware 1.0.0
03.14.08_G is firmware 1.0.1 and 1.02
04.01.13_G is 1.1.1
I have very bad luck here. I’ve just got my brand new iPhone yesterday. After i got home i plug it in my G4 right away and iTunes pop up asking me to update new version. Then i click yes, restore, OK… then got warning about invalid SIM after reboot iPhone. After reveiwing a serveral forums can’t find any help. I’ve checked my iPhone version it’s a 04.01.13_G firmware. Any one get any luck yet please share your comments here or all of us paid $500 for just sitting around and watch the iPhone Activation Screen. Thanks!
Kevin,
you should restore it using this guide. not just simply by clicking restore, it will make your iPhone to 1.1.1
I think we should digg this to remind all of us to restore it carefully.
Admin: Tha´ts not possible at the moment.
I can´t press the digits.
The only thing the screen shows me is a logo on the iTunes and a arrow and a usb-connection.
Maybe that can say which version I have?
Admin: I managed somehow to check the version.
It is 1.1.1! I bought my iPhone att AppleStore in NY 5th Avenu in friday. Just so you other know!
Micahel,
There is a new method to make the downgrade possible. Try it out!
We are looking for your reports anyway.
http://gizmodo.com/gadgets/breaking/how-to-unbrick-an-iphone-confirmed-apps-are-back-but-unlocked-phones-still-cant-call-updated-now-with-video-demo-305230.php
If i bought a new iPhone, what firmware will it be? If its not 1.1.1, how do i upgrade the firmware to 1.0.1 or 1.0.2?, will i able to unlock it to use any sim carrier?
Ohm,
first, download the firmware from the link above. than using the above method to try to restore the iPhone using 1.0.2 firmware.
i HAVE DOWNGRADED THE IPOD TO 1.0.2 BUT THE FIRMWARE IS STILL 04.01.13_G
i CAN ACTIVATE BUT NOT UNLOCK THE IPHONE WITH ANY TOOLS
ANY SUGGESTIONS’?
sIMONE,
you can now downgrade your iPhone (You said iPod in the first sentence…) with old baseband now. The guide can be found right here:
http://code.google.com/p/iphone-elite/wiki/DowngradeBasebandWin
Do it at your own risk.
By clicking on one of a link above i went to unlock.no where i read that i can restore my phone with 1.02 using itunes as i was indeed having some problem with third party application installed which could not b uninstall. i did managed restored to 1.02 again but no my iphone asking to ACTIVATE IPHONE. need urgent help how to do. i bought it unlocked here in Hkg. try ibricker but it can not recognize and asking me to jailbreak first. but how to bcos when i open i tune there is no option and ask me to actiave
mkq786,
Are you using the new iTunes in Windows? You need to copy the iTunesMobile.dll to the iBrickr to make sure it works.
If you still cannot get it, try this modified version:
http://winandmac.com/files/ibrickr_mod.zip
hi,
maybe you can help me on my iphone. im an expat living presently in dubai, i bought an iphone last month an its unlock, right now i dont know what happened, the lower part of the touchscreen is not working but the upper part lik message, calendar photos , cameras , youtube , map and weather is working. clok, calculator,. notes settings, phone, mail, saafari, and ipod is not working. in other words , half screen is working, half is not. i dont if ist software realated or hardware. please help.
thanks
christian,
This is hardware failure. Sorry to say that
You need to buy a new one, most likely
hi guys!i have an iphone and i tried to update it with the itunes then suddenly it did not work anymore.the moment i press the power button it showing only an itunes logo,arrow and a cable.please help me what should i do.i tried the above link to restore it but it says (iphone could not be restored possible error occured).please i want to fix it,just bought my iphone.thnx in advance!
Hi all… I follow all this steps to restore my iphone and I have this problem…
The iphone never came out to work since I start to restore it from the itunes, but itunes didnt show an error, its preparing my iphone to restore since yesterday at 9 pm and nothing happens.
Im sure i had the 1.0.1 version and i studied all over internet including this site before I started to restore my iphone, I guess I miss something…
I hope some one can help me cuz I luv tht iphone… pls
This guide is not necessary anymore for iPhone 1.1.1 or 1.0.2. Check out the new jailbreak and unlock guide for iPhone 1.1.1 or earlier.
I cannot restore my iphone from version 1.1.2
I had to upgrade from 1.0.2 because My iphone gave me the Yellow tringle warning, and itunes did not let me restore to an older firmware.
I tried installing 1.1.2 to see if I could revert from here, but no sucess. (1.1.2 installed perfectly)
I keep gettin Error 1 When Itunes tries to restore to a previous version.
Any suggestion?
A.M.
Read this for the most updated guide:
http://www.winandmac.com/mobile/iphone/unlock-iphone-112-via-downgrade/
I followed all the instruction. After retracting software it appeared “the iphone could not restored. An unknown error occured (5)”. All over and all over again. i don’t even know what is ‘error(5)’ is. Can anybody help advice.
louisa,
Ah… No one understand “this guide is not working” sentence
I have installed ibrickr and anysim and have gone through all the processes. After I enter the code for the sim I get a message saying “Incorrect SIM please connect to iTunes to reactivate phone. ”
What can I do?
Happy,
I feel so sad you don’t read “this guide don’t work anymore”.
Hi,
Which is more updated version 1.1.1 or 1.1.2?
hi my iphone installer is not working.. after i download apps from my iphone … icannot send email brwose on safari evevn send txt message.. what will i do? help me please
my iphone installer is not working no safari cannot send txt message .. what will i do .. how can i restore my 1.1.2 iphone
Hi,
Hi i have ver. 1.1.1 in my iphone and it is unlock
i tried to install installer in my iphone i can’t do it. After clicking install appsnapp it gose to safari and it says untitled at the top pls help to solve this problem i will be very thankful to u.
I tried restoring my Iphone to 1.0.2 through Itunes but unfortunately have not been successful as it did not restore now my Iphone is stuck with the yellow triangle. All suggestion welcome.
Ok, so i did everything that was said on this forum, and now instead of error 1611 its now error 20… my brother gave me this iphone and i searched everywhere over the internet and this forum has probably helped me the most but now its error 20….can u help me out on this one??
i did everything that was said on this forum, and now I got error 20….can u help me out on this one??