News today from Twitter where security guru Dan Rosenberg, @djrbliss, posted an image of a Samsung Galaxy S 4 with what appears to be an unlocked bootloader that he managed to hack. Rosenberg had already achieved root on the new devices on launch day when he figured out an unlock tool intended for Motorola devices would also work on the Galaxy S 4 thanks to the use of Qualcomm chips. The downside is that nothing much can be done once rooted and the risk related to bricking a brand new device is a little higher than normal as no recovery options or stock images are available yet. Hopefully Rosenberg’s work is about to change some of that as his image appears to indicate that he has recovery running. Rosenberg is expected to release more details later today on exactly what he has achieved and how others may replicate his efforts.