Apple today has unexpectedly released the new iPhone 3.1.3 firmware for iPhone 3G/3GS and iPod touch. This is not the same version which runs on the newly announced Apple iPad (OS 3.2). To update to iPhone OS 3.1.3 Firmware, all you will have to do is to connect your iPhone with your computer via usb and start iTunes. You should now see a message as shown below. Simply click on “Download and Install” button to get on to the new iPhone OS 3.1.3 firmware.
Note: Do not update your iPhone to OS 3.1.3 yet if your phone is currently jailbroken or unlocked on firmware 3.1.2. Wait for the new jailbreaking and unlocking tools before updating your device or you may loose the capability to jailbreak or unlock your device in the future. You have been warned!
Change log for iPhone 3.1.3 is as follows:
improves accuracy of reported battery level on iPhone 3GS
resolves issue where 3rd party apps would not launch in some instances
fixes bug that may cause an app to crash when using the Japanese Kana keyboard
UPDATE 1: iPhone 2G and iPod touch 1G/2G(older models) can be jailbroken and unlocked(iPhone 2G only) on the latest iPhone 3.1.3 firmware. Follow the step by step guide posted here or here to jailbreak/unlock iPhone 2G, and here for iPod touch 1G/2G.
UPDATE 2: Redsn0w 0.9.4 is LIVE! Download links and jailbreaking instructions can be found here.
UPDATE 3: Sn0wbreeze 3.1.3 -V1.3 is LIVE! Follow the guide posted here to jailbreak iPhone 2G, 3G and iPhone 3GS (older bootrom only) on iPhone 3.1.3 firmware. iPhone 3G and 3GS can then be unlocked using ultrasn0w or blacksn0w. iPhone 2G can be unlocked using the guide posted here.
UPDATE 4: PwnageTool 3.1.5 for Mac OS X is now LIVE! Follow our complete step by step guide posted here to jailbreak and unlock iPhone 2G, 3G, 3GS and iPod touch 1G, 2G on iPhone OS 3.1.3.
UPDATE 5: iPhone 3.2 for iPad has gone Gold Master! More info along with download links can be found here. [iPad Only Release]
UPDATE 6: Download iPhone OS 4 Beta Developers Preview for iPhone and iPod touch. More info can be found here.
Download iTunes 9.0.3 for Windows and Mac Download iPhone 3.1.3 firmware for iPhone 2G Download iPhone 3.1.3 firmware for iPhone 3G Download iPhone 3.1.3 firmware for iPhone 3GS
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