Apple has recently provided a minor update iPhone 3.1.3 to fix some security bugs. George Hotz (GeoHot) has been releasing jailbreaking and unlocking tools for iPhone.
Although redsn0w 0.9.4 tool is available to jailbreak iPhones, people are waiting for blackra1n to successfully jailbreak and unlock their devices. The latest redsn0w tool works only on iPhone 2G and old version of iPod touch.
If you want to jailbreak iPhone with redsn0w 0.9.4, check the following link.
Few days back, GeoHot updated about blackra1n for iPhone 3.1.3. He said that there is no solution for 3.1.3 firmware on new devices. The latest iPhone firmware updates old baseband to 05.12.01 and if you try to update iPhone, it will lock the phone permanently.
Blackra1n or any other tool will be available very soon to hactivate iPhone 3.1.3 firmware. Just wait for few more days…