Release History
Downgrade application iOS3Folders on previous version for better stability, Added new version application Backgrounder, SIManager & sandcastle.
This version was released for device iPhone 2G.
Checksum
File: iPhone1,1_3.1.3_7E18_BlackDoor_4.2.1.ipsw
Size: 277.732.723 B
Hash: 8977FC5242DF706D2084BA4397335AE4