The jailbreak comes less than a week after the US Copyright Office made it legal for users to the jailbreak iPhone.
Jailbreaking any smartphone to make the operating system on that phone interoperable with an independently created application is "fair use", the Copyright Office said in its ruling.
Unlike previous methods for by-passing Apple's locking systems, the jailbreak for the latest iPhone is browser-based and does not require users to run the software on a computer.
The jailbreak has been released through the jailbreakme.com website, and users simply have to visit the site using their iPhone browser to begin the jailbreaking process to modify the iOS mobile operating system found on the iPhone, iPod touch and iPad.
But some users have reported that the latest jailbreak has disabled multimedia messaging and Facetime functionality, according to reports.
The author of the jailbreak has indicated via Twitter using the handle "comex" that work has begun on a fix for these problems.
This story was first published by Computer Weekly