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I have a Nexus S (2.3.3, GRI54/I9023, bootloader unlocked, clockworkmod recovery installed, rooted) and I'm trying to flash it with a stock system.img that I built myself (no modifications - yet).

To make the stock Android build, I followed the instructions for making a build found at http://source.android.com/source/download.html. The build was successful and the system does work when run on the emulator.

To flash the ROM, I connect the phone, boot with Volume up + Power, connect USB and type

fastboot flash system system.img

The response that is shown on the phone is

Invalid magic code 0x00000003

What does this mean? What's wrong?

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I believe you need the stock recovery, based on http://2chnull.info/r/smartphone/1292830738/801-900. You can get back to stock recovery easily, for example follow this thread: http://forum.xda-developers.com/showthread.php?t=884093

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  • So with an unlocked bootloader and the stock recovery image I should be able to flash ROMs signed with the default test keys that are included in the public Android repository? – Tomas Andrle Apr 4 '11 at 8:38
  • Also, the nandroid backup rom linked in the xda forum is marked GRH78 - could that be a problem for my GRI54? It took me a while to find a custom rom that would work. – Tomas Andrle Apr 4 '11 at 8:46
  • Yes, unlocked bootloader + stock recovery should allow you to flash those ROMs. I would also assume GRI54 would work just as well as GRH78. – Matthew Read Apr 4 '11 at 13:09

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