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How to update the software on my Apple iPhone 8 using iTunes — Step 1/9

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When new versions are available, you can update the software on your Apple iPhone 8 for extra features and better performance. Here, we show you how to update your phone using iTunes v12.5.1.21.
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How to update the software on my Apple iPhone 8 using iTunes — Step 2/9

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On your computer, start iTunes.
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How to update the software on my Apple iPhone 8 using iTunes — Step 3/9

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Connect your Apple iPhone 8 to your computer using the USB cable.
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How to update the software on my Apple iPhone 8 using iTunes — Step 4/9

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iTunes will automatically search for software updates. If prompted about a new version, click Download and Update.
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How to update the software on my Apple iPhone 8 using iTunes — Step 5/9

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Click Next.
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How to update the software on my Apple iPhone 8 using iTunes — Step 6/9

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Click Agree.
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How to update the software on my Apple iPhone 8 using iTunes — Step 7/9

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iTunes will download the software update.
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How to update the software on my Apple iPhone 8 using iTunes — Step 8/9

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The software update will then be applied to your iPhone.
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How to update the software on my Apple iPhone 8 using iTunes — Step 9/9

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Your iPhone will restart to complete the update.