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My phone went into recovery mode too, and I had error code 9, which apparently indicates USB trouble. I tried all the remedies (different USB port, different PC, etc). Ended up getting it replaced at the Apple store. Weird thing when I went to restore all my crap on the phone, it said I had one new image to download, and it was a picture I had taken just prior to this fiasco. I assume it got stuck in a buffer somewhere.
 
So, iTunes downloaded and installed 4.0.1 on my iPhone4 this afternoon and failed. After the phone reboots it will get stuck at the connect to iTunes screen and iTunes throws an 1004 error that the update failed.
I've tried restoring twice in DFU with no luck, I even tried restoring to 4.0 through DFU with the same result: Error 1004.

Anyone else having this issue?

I had a similar problem, although my error was a 1603 (I think). This was on my iMac, my primary computer. iTunes then reported my phone was in recovery mode and I needed to restore, that appeared to work until the progress bar in iTunes was almost finished then it hung. I let it sit for 20 minutes. I tried this a second time, same problem.

Finally hooked my iPhone up to my Windows7 laptop and it installed the 4.01 upgrade just fine. Then I plugged the phone back into my iMac and did a restore from the backup I had taken.
 
I got a 3004 error on the first attempt, but that's most likely because my internet connection went a bit haywire. Second attempt worked with no problems, restored from backup and my phone's now running fine. Though I've not noticed a discernible difference except the slightly higher first bar. My signal is the same level as it was before and still drops in the deathgrip.
 
iPhone brick update:

Mine went into Recovery Mode loop and kept generating unknown error 14. Tried uninstalling iTunes, using new USB cable and port, also went to new computer and repeated all steps. Didn't work. Out of frustration and accepting some risk, used 3rd party Windows programs RecBoot and TinyUmbrella to kick iPhone out of recover mode . Both failed, as well.

Called Apple Support this morning. Got afternoon appointment at local store to pick up a replacement.

After reading many forums while attempting to restore, I think this is more of a generic update problem vs. one specific to iOS 4.01. My problems sounded just like iPod and earlier iPhone users got while installing past updates as far back as some Gen 1 models.
 
I tried to upgrade my iPhone 4 from iOS 4.0 to 4.0.1 six times. Each time it ended with an error:

The iPhone "iPhone" could not be restored. An unknown error occurred (9).

Following a tip posted on one of Apple's support forums I was able to fix it using RecBoot 1.0.2 . RecBoot has two parts --- one to put your phone into Recovery Mode and the other to Exit Recovery Mode. After running "RecBoot Exit Only" my phone rebooted and synced with iTunes.

Don't know why this is only happing to some of us but there is definitely a problem with upgrading to 4.0.1.
 
RecBoot Exit worked! Got out of the weird "Connect to itunes loop" now to restore everything, ugh...

Thanks forum peoples!
 
How long should the install take?

The progress bar is stuck at half way on mine for the last 15 mins, not sure what to do

i have the same problem, mine is about 3/5 the way through and it's just hanging there. The progress bar on iTunes which says 'restoring iPhone software...' is about 95% done - its been doing this for about 20 minutes now.
 
Found this in another thread. I think this was my problem before i used a mac and recboot...

Have you ever edited your "hosts" file?

I was getting the same error (1004) until I went in and removed Saurik's server from my list of hosts. Seems Apple's not too keen on us skirting their rules anymore.
 
So I was just like everyone else! Got error 9 like 9 million times to no avail. I have an iPhone 4 and using Win7 64-bit. But guess what? When I plugged my gf's iPhone 3GS upgrading from 3.1.2 to 4.0.1 it worked completely fine without a hiccup. Weird... I'm guessing it has to do with a certain batch of iPhone 4's?

Eventually I was able to kick my phone out of recovery using Tiny Umbrella which btw works flawlessly. Now, I'm just trying to figure out if this actually hurts my phone in any way? Anyone care to chime in if using Tiny Umbrella or RecBoot messes up the phone whether it be performance or whatever?

I'm contemplating of just restoring my phone again to get the error 9 and return for a new one. Once again, does anyone know if they actually give you a brand new one or a refurbished iPhone 4?
 
Found this in another thread. I think this was my problem before i used a mac and recboot...

Yep mine was the same problem too minkept getting the 1004 error I believe it was. Anyway, I remember a few months ago modifying the "Hosts" file for my iPod touch. I had to go and delete a line out of it and save it, then my iPhone finally came out of recovery mode and updated.
 
I found out that if u used the spirit jailbreak on ur 3GS and then restored off ur backup onto ur new iphone 4, then this causes problems when updating software... The info below helped me out as well... Also using the apple cord that came with the new iPhone or iPad also seems to be neccassary.

Originally Posted by nicksherb
Hey I had the same problem, while beta testing 4.0 whats more so I was very worried. However, turns out you just need to uninstall itunes and some core files

If you are still unable to restore iPhone, remove iTunes by doing this:

If you are a Mac user, delete the following files:


2. /System/Library/PrivateFrameworks/DeviceLink.framework
3. /System/Library/PrivateFrameworks/MobileDevice.framework



After that, restart your Mac and install the latest version of iTunes. Repeat the normal restore again.

For Windows users, uninstall Apple Mobile Device Support and iTunes from your system, restart the computer and re-install the latest version of iTunes from apple.com and try to restore again.
 
My iPhone 4 hung up on "updating firmware" during multiple attempts at installing the 4.0.1 update. I received error code 9 - unable to restore. Apple's tech support suggested trying a new USB cable, trying a new USB port, and trying a different computer. After no luck they finally suggested I take it to a genius bar. The Apple store couldn't restore it, so they gave me a new one from a black box sealed with a pink sticker. I have to assume it was new and not a refurb, but I'm not positive (they didn't give me the box, just the phone).

I was finally able to restore the new one they gave me to a backup on the same computer and the update to 4.0.1 worked fine.
 
Mine bricked last week and was replaced. A friend of mine just tried and it bricked his. I'm guessing this is a glitch in the software somewhere. Why hasn't it been fixed?
 
Omg after being up most of the night I found this http://chrisgrannell.co.uk/2010/07/16/iphone-4-0-1-brick-solution/ i followed the instructions (by this time I's tried so many things I was beyond worrying), set it to restore and went to bed Just got up and woo hoo! Restored, updated and synced with yesterdays back up! Even the apps were where I'd put them!

Mnay thanks to Chris for posting that - cant remember where I found it but thought I'd pass it on in case it can help anyone else.

I was getting the error 14 message btw and was stuck in the recovery/restore loop. But I'm not now!!:D
 
!!!

This is so freaking lame!!!

Comic-Con is TOMORROW!!! I thought: "I should install the new update to see how the signal displays downtown"... And surely enough this happens!!! :mad::mad::mad:

I won't lie, I am ****ing pissed off that this happened, right before I go to sleep no less!!! I leave when I wake up so will it sync automatically???

This ****ing obstruction will cost time I don't have tomorrow and was finally a chance for me to actually use some of my data!

...


GREAT!!!! ****!!! It just had the same error again! What the **** am I to do now, man this is so freaking lame. I am a loyal costumer and apparently this is not some small problem!!!

DAMN! Will take HOURS to sync and that is assuming I can even reboot this little ****er! There goes my GPS nav for downtown!!! Man, I just can't believe that this is happening!!! :(:(:(

What am I to do??? OMG I'M DEPRESSED!!!
 
Mine has done the same thing 3 times... its annoying i used black rain to pull out of recovery. This seriously has to get fixed
 
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