Apple has released the iOS 4.3.1 IPSW (final version) for iPhone, iPod Touch and iPad and is available for download. The iOS 4.3.1 firmware comes up with some bug fixes, fixing some vulnerabilities. The iOS 4.3.1 firmware also fixes the battery drain problem which was present on iOS 4.3.
You could update your iPhone 3G/3GS/4 or iPod Touch 2G/3G to iOS 4.3.1 using iTunes. You could download iOS 4.3.1 IPSW files from the below given direct download links by Apple.
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