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SEPO
This tag contains the Security Epoch of the device that the firmware image is supposed to be ran on. It allows Apple to make sure you are not running another device's firmware files on an incompatible device, probably to prevent using old exploits.
Devices
- iPhone: 0x04
- iPhone 3G: 0x04
- iPhone 3GS:
- iPhone 4 (GSM):
- iPhone 4 (CDMA):
- iPod touch: 0x04
- iPod touch 2G: 0x01 (Batch 1), 0x02 (Current)
- iPod touch 3G:
- iPod touch 4:
- iPad 1G:
- Apple TV 2G:
