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ECID

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Revision as of 13:31, 26 June 2009 by Drg (talk | contribs) (New page: The '''Exclusive Chip ID Tag''' or ECID, is a 3GS device specific numeric identifier which is sent to Apple during a restore. The ECID included in a new, device specific, signed img3 file ...)
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The Exclusive Chip ID Tag or ECID, is a 3GS device specific numeric identifier which is sent to Apple during a restore. The ECID included in a new, device specific, signed img3 file abd sent back to iTunes.

The implication of this is Apple could dissallow downgrades (even via DFU) on newer devices and even on older devices once new firmware is released.

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