Apple's latest update for the iPhone operating system fixes three bugs, but it appears to fall short of addressing ongoing issues with poor battery life and Wi-Fi glitches.

The iPhone software update released by Apple (NASDAQ: AAPL) brings the current version to OS 3.1.2 just a month after the last upgrade. The 200MB upgrade file for the iPhone, iPhone 3G and iPhone 3GS can be downloaded through iTunes.

In this latest release, Apple fixed a "sporadic issue," in which the iPhone would not wake up from sleep mode, dubbed "coma mode" in user forum discussions.

The update also "resolves intermittent issue that may interrupt cellular network services until restart and fixes a bug that could cause occasional crashes during video streaming," according to Apple's release notes.

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