Yesterday we informed you about new update of iTunes(9.0.3) and now here is another update available via iTunes. This time it is Apple most talked iPhone OS,  iPhone 3.1.3 for iPhone 3G/3GS and iPod Touch.

To update your gadget just connect your iPhone or iPod with your computer via usb and start iTunes. You should now see a message about your OS update. Simply click on “Download and Install” button to get onto the new iPhone OS 3.1.3 firmware.

Change Logs:

• 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

Note: Jailbroken iPhone user should stay away from this update and should wait for the new jailbreaking and unlocking tools before updating the device. Doing this update may take away jailbreaking or unlocking capability from their gadget.

Download iPhone 2G 3.1.3 OS

Download iPhone 3G 3.1.3 OS

Download iPhone 3GS 3.1.3 OS