Dev-Team just announced that it has finally managed to Jailbreak/Unlock iPhone 3GS on Firmware 3.1. Dev-Team unveiled this information on their website and twitter status. Their recent tweets about subject are as follows:
Further to my last post, the 3gs 3.1 jailbreak does not apply to OTB or non-downgradable 3.1 device
3gs 3.0 pwned->3.1 pwned. Props to Musclenerd, Wizdaz and thanks Bumble-Bee & ToddJG for testing. (tinyurl.com/y8sr4p3) (tinyurl.com/y8z277l)
Following screen shot shows an iPhone running on firmware 3.1 (7C144) and Modem Firmware version 04.26.08.
Developments are still under progress for Jailbreaking iPhone 3GS on Firmware3.1, but we should anticipate updated versions of PwnageTool along with Ultrasn0w soon for jailbreak. We will post a detailed step wise procedure as soon as we'll get any update. Keep visiting for more updates
Update : Jailbreak iPhone 3GS on Firmware 3.1 with PwnageTool 3.1.3
Update : Jailbreak iPhone 3GS on Firmware 3.1 through Windows
Update : Unlock iPhone 3GS on Firmware 3.1 through Ultrasnow