Error 29 when trying to restore to iOS4

Ok so yesterday when attempting to upgrade to iOS4, there was an error and my phone got locked in recovery mode. Every time I try to restore it, at the end of the proccess an error window pops up saying:

"The iPhone "iPhone" could not be restored. An unknown error occurred (29)."

I'm not a whiz when it comes to this stuff so could someone give me some suggestions?

Unibody Macbook, Mac OS X (10.6.4)

Posted on Jun 22, 2010 4:54 AM

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mrwesdunn

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Posted on Jun 23, 2010 5:22 PM

I am experiencing the exact same error 29 loop. I work closely with these devices and did an experiment that had some interesting results. With the aftermarket battery installed, the update resulted in error 29 every time, but when I re-installed the original 3GS battery the device would complete the update perfectly.

The only difference in these 2 batteries were the circuit board that sits atop the battery and the part number. My original battery read "616-0434" and my replacement read "616-0431," I'm not entirely sure what any of this means.

Seeing the post from the Malaysian users makes me wonder if this is an Apple iOS 4 bug, and some battery model numbers were'nt included in the update.

I think Drew's error message log is VERY telling, there is something in the update that is working with the battery and some batteries aren't responding, or worse, being excluded. Can't wait to get to the bottom of this.

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22 replies

Jun 27, 2010 11:08 PM in response to criddar

All that the video does, is stop the Restore Loop. It does not however fix the error 29, nor does it fix the spontaneous reboots in iOS4. Also this 3GS was not updated at the baseband during update to iOS4, very odd. I really hope 4.0.1 (due to be released this week, because of iPhone 4 antenna issues) will fix these **** bugs.

JL_kk

Level 1

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Jun 22, 2010 7:32 AM in response to lukatore

I'm having the same problem too - error 29. Hoping there's a solution soon or else i have to send the phone to 'repair'.

BrentR

Level 1

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Jun 22, 2010 7:59 AM in response to JL_kk

Same here. I've tried almost every suggestion I could find. This is very frustrating. Either of you previously replace your battery by chance?

JL_kk

Level 1

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Jun 22, 2010 8:01 AM in response to BrentR

Nope, i just got my iphone 3gs 16g 3 months ago.

Jun 22, 2010 8:31 AM in response to wjosten

the error message does indeed indicate a hardware issue, but it's hard to imagine that upgrading the os would suddenly cause my hardware to fail.

Jun 28, 2010 8:30 PM in response to gradyboy

@gradyboy:

iRecovery did not fix your Error 29, it merely helped you to get out of the Restore Mode Loop.
Still, when you'll restore you'll get the 29 popping up.

Jul 13, 2010 12:35 PM in response to ralphreijs

As you say @gradyboy, iRecovery not fix the error but the iphone out of the loop, I'm from Argentina, and to update the 3gs to ios4, get the same results

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Error 29 when trying to restore to iOS4