ID #1056 How to jailbreak a iPhone 3G or 3Gs with iPhone OS 3.1.2? (with tethering?) Daniel Urstöger 12-01-2010 15:10 0 Comments this time the answer is (finally!!!) quite easy: update your iPhone via iTunes to iPhone OS 3.1.2 Download and run Blackra1n (runs on Windows and Mac OS X) enjoy!!!