While we believe that the firmware is not mature enough to be used by end-users, limiting it to the developers is still a bit unfair. Therefore! we are providing the links to download the iPhone 4.0 beta firmware.
It may be noted; the firmware may only be used by the user for testing-purposes as it is not meant for daily use. Also! Those who would like to keep their devices Jailbroken and Unlocked should stay away from this firmware as there is a good chance that they might not be able to restore to a previous firmware ever. The list of firmware as provided by Apple:
* iPhone1,2_4.0_8A230m_Restore.ipsw (iPhone 3G)
* iPhone2,1_4.0_8A230m_Restore.ipsw (iPhone 3GS)
* iPod2,1_4.0_8A230m_Restore.ipsw (iPod Touch 2G)
* iPod3,1_4.0_8A230m_Restore.ipsw (iPod Touch 3G)
To download the firmware for your device; follow onto this link. Only available for iPhone 3G/3GS and iPod Touch 2G/3G. Only those with iPhone 3GS and iPod Touch 3G would be able to take advantage of multitasking on their device.