- 1). Connect your iPhone to your computer using the device's USB cable and launch iTunes if the application doesn't automatically start.
- 2). Click the iPhone icon in the left side bar of the iTunes application window.
- 3). Click "Sync" in the lower right corner of the window. Allow iTunes a moment to finish synchronizing with your iPhone.
- 4). Select the "Summary" tab.
- 5). Click the "Update" button to run the update, click "Update" in the confirmation dialog box, and click "Next" in the installation dialog box. The update downloads to iTunes and installs to your iPhone.
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