iPhone OS 3.1.3 addresses several specific bugs as well as offers fixes for a handful of security issues. Full details on the security updates included in iPhone OS 3.1.3 are available in the associated support document. – Improves accuracy of reported battery level on iPhone 3GS – Resolves issue where third-party apps would not launch in some instances – Fixes bug that may cause an app to crash when using the Japanese Kana keyboard 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 confirming the new available update. Simply click on “Download and Install” button to get the new iPhone OS 3.1.3 firmware! IMPORTANT: 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
Download iPhone OS 3.1.3 (Direct Download links)
Download iPhone 2G 3.1.3 OS Download iPhone 3G 3.1.3 OS Download iPhone 3GS 3.1.3 OS Update: Jailbreak iPhone OS 3.1.3 with redsn0w 0.9.4
