Apple has taken steps to ensure a new shipment of iPhone 3GS smartphones is more hack-proof than ever, according to reports.

Last week, Apple began shipping 3GS iPhones with an updated bootrom (iBoot-359.3.2) that effectively blocks the current 24kpwn jailbreak exploit, PC World reported.

Now, Apple is attempting to stop the jailbreak in its tracks by shipping new iPhones with an updated bootrom (iBoot-359.3.2) that is resistant to the 24kpwn exploit used by the Dev-Team and others to jailbreak the iPhone.

Every major hardware or firmware update has broken the jailbreak tool of the time- but for every update up to now the Dev-Team has pulled through to support the growing community of users who wish to install unapproved iPhone apps.

Electronics Apple inc. Apple Iphone