Apple has just released the latest version of iPhone OS firmware that is 3.1.3 and is now available for download from the iTunes. This latest version of firmware is for iPod Touch, iPhone 3G, and iPhone 3GS. After the launch of iPad, many was expecting that Apple will release iPhone OS 3.2 firmware which is being used by iPad, but instead they released the iPhone OS 3.1.3 firmware.

The iPhone OS 3.1.3 firmware update is released to resolve some issues and contains only fixes for bugs that was found in iPhone OS 3.1.3 firmware.
Note for the unlocked/jailbroken iPod Touch or iPhone users: Do NOT update your iPod Touch or iPhone to OS 3.1.3 firmware if you've unlocked or jailbroken it on OS 3.1.2 firmware. So you've to wait until the new unlocking and jailbreaking tools are released for OS 3.1.3 firmware.
Change log for iPhone OS 3.1.3 firmware
Following are the new changes in this latest version of iPhone firmware:
- 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
How to update to iPhone OS 3.1.3 firmware
Just following the below steps to update to iPhone OS 3.1.3 firmware:
- Connect your device with your computer via USB
- Start iTunes
- Now check for updates in iTunes
- After the new software update message is shown, just click on the "Download and Install" button
Direct download links of iPhone OS 3.1.3 firmware
Below are the direct download links of iPhone OS 3.1.3 firmware:
Download iPhone OS 3.1.3 firmware for iPhone 2G
Download iPhone OS 3.1.3 firmware for iPhone 3G
Download iPhone OS 3.1.3 firmware for iPhone 3GS
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