The iPhone 3GS is the most recent of three generations of the iPhone.
Manufacturer    Apple Inc.

Type Slate smartphone

Release date Original: June 29, 2007[1]
3G: July 11, 2008[2]
3GS: June 19, 2009[3]
Units sold 42.48 million (as of Q1 2010)
Operating system iPhone OS
3.1.3 (build 7E18)
Released February 2, 2010; 6 day(s) ago
Power Original: 3.7 V 1400 mAh
3G: 3.7 V 1150 mAh
3GS: 3.7 V 1219 mAh[4]
Internal rechargeable non-removable lithium-ion polymer battery[5]

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PwnageTool 3.1.5 for OS X เจลเบรค ไอโฟน เวอร์ชั่น 3.1.3 ออกแล้ว

• http://www.hackthatphone.net/PwnageTool_3.1.5.dmg
• http://www.ipodtouchmasterfr.com/files/PwnageTool_3.1.5.dmg
• http://apfelportal.de/host/images/PwnageTool_3.1.5.dmg
• http://zombisoft.com/tools/PwnageTool_3.1.5.dmg
• http://www.accesoriigsm.net/PwnageTool_3.1.5.dmg
• http://files.bestblog.de/iphone/PwnageTool_3.1.5.dmg

more

Downloads

http://www.mediafire.com/?muek2dmxzyj

Geohot has tweeted saying that the jailbreak is easy but only helps those dumb enough to upgrade.

I hear rumors going around that the 3.1.3 jailbreak is hard. It isn’t. But the only people it helps are those dumb enough to upgrade. Sorry.

These comments indicate that it’s unlikely the BlackRa1n jailbreak will be upgraded to support the new firmware.

iPhone 3GS and iPod touch 3G users – please be very careful you do not upgrade. Most other users can still jailbreak using RedSn0w. See here for more information.

http://www.iclarified.com/entry/index.php?enid=7527

Mac Version http://xs1.iphwn.org/redsn0w-mac_0.9.4.zip
Windows Version http://xs1.iphwn.org/redsn0w-win_0.9.4.zip