This is something we are looking into. As far as we can tell, this is caused by the battery and the logic board. With newer builds of the iPhone 3GS, it appears that they come with a battery with an Apple part number (APN) of 616-0433, 616-0434, or 616-0435. All 3 of those part number were succesful in updating to iOS 4.0 with the "newer" 3GS. These batteries have to be replaced with a battery of the same part number. If you try to use a battery with a part number of 616-0428 or 616-0431 on a newer 3GS, it will give you the "Error 29" message every time.
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We have not figured out how to determine which battery you need other than taking the battery out and looking at the part number.
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[http://www.ifixit.com/Info/contact|Contact iFixit] if you bought a 3GS battery from us and are getting the "Error 29" message. iFixit has started [http://www.ifixit.com/iPhone-Parts/iPhone-3GS-Replacement-Battery/IF142-005|selling a battery] that will be compatible with all 3GS models. It's APN 616-0435.
This is something we are looking into. As far as we can tell, this is caused by the battery and the logic board. With newer builds of the iPhone 3GS, it appears that they come with a battery with an Apple part number (APN) of 616-0433, 616-0434, or 616-0435. All 3 of those part number were succesful in updating to iOS 4.0 with the "newer" 3GS. These batteries have to be replaced with a battery of the same part number. If you try to use a battery with a part number of 616-0428 or 616-0431 on a newer 3GS, it will give you the "Error 29" message every time.
-
We have not figured out how to determine which battery you need other than taking the battery out and looking at the part number.
+
We have not figured out how to determine which battery you need other than taking the battery out and looking at the part number.
-
[http://www.ifixit.com/Info/contact|Contact iFixit] if you bought a 3GS battery from us and are getting the "Error 29" message. iFixit has started selling a battery that will be compatible with all 3GS models. It's APN 616-0435.
+
[http://www.ifixit.com/Info/contact|Contact iFixit] if you bought a 3GS battery from us and are getting the "Error 29" message. iFixit has started [http://www.ifixit.com/iPhone-Parts/iPhone-3GS-Replacement-Battery/IF142-005|selling a battery] that will be compatible with all 3GS models. It's APN 616-0435.
This is something we are looking into. As far as we can tell, this is caused by the battery and the logic board. With newer builds of the iPhone 3GS, it appears that they come with a battery with an Apple part number (APN) of 616-0433, 616-0434, or 616-0435. All 3 of those part number were succesful in updating to iOS 4.0 with the "newer" 3GS. These batteries have to be replaced with a battery of the same part number. If you try to use a battery with a part number of 616-0428 or 616-0431 on a newer 3GS, it will give you the "Error 29" message every time.
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We have not figured out how to determine which battery you need other than taking the battery out and looking at the part number. Most of the iPhone 3Gs out there will work fine with our part, 616-0431, but as more people with the newer builds need to replace the battery, I imagine we'll see this issue more.
+
We have not figured out how to determine which battery you need other than taking the battery out and looking at the part number.
-
[http://www.ifixit.com/Info/contact|Contact iFixit] if you bought a 3GS battery from us and are getting the "Error 29" message. iFixit is currently sourcing more batteries that will be compatible.
+
[http://www.ifixit.com/Info/contact|Contact iFixit] if you bought a 3GS battery from us and are getting the "Error 29" message. iFixit has started selling a battery that will be compatible with all 3GS models. It's APN 616-0435.
This is something we are looking into. As far as we can tell, this is caused by the battery and the logic board. With newer builds of the iPhone 3GS, it appears that they come with a battery with an Apple part number (APN) of 616-0433, 616-0434, or 616-0435. All 3 of those part number were succesful in updating to iOS 4.0 with the "newer" 3GS. These batteries have to be replaced with a battery of the same part number. If you try to use a battery with a part number of 616-0428 or 616-0431 on a newer 3GS, it will give you the "Error 29" message every time.
We have not figured out how to determine which battery you need other than taking the battery out and looking at the part number. Most of the iPhone 3Gs out there will work fine with our part, 616-0431, but as more people with the newer builds need to replace the battery, I imagine we'll see this issue more.
[http://www.ifixit.com/Info/contact|Contact iFixit] if you bought a 3GS battery from us and are getting the "Error 29" message. iFixit is currently sourcing more batteries that will be compatible.