iPhone OS 3.1.3 download is now available from the iTunes store. When everyone was expecting an iPhone OS 3.2 update for the iPhone and iPod Touch as seen on the iPad, Apple released iPhone 3.1.3 firmware.

This iPhone 3.1.3 firmware update is more like a bug fix release which resolves some issues that were experienced in iPhone 3.1.2 firmware.

Some bits of iPhone 3.1.3 OS were found a while ago at BGR, but soon after that the Apple iPad hype was so high that it was soon forgotten that Apple was indeed working on something for the iPhone too.

You can update your iPhone to the latest iPhone 3.1.3 firmware by connecting your iPhone with your computer and check for update in iTunes.

Do NOT update if you have a jailbroken/unlocked device which is running on an OS prior to iPhone 3.1.3.

In case you need direct download links, they will be added soon. Keep checking back!