Ensure your device is connected to a power source. To avoid potential data costs connect your device to a Wi-Fi network.
2. Go to Settings > General > Software Update. iOS will automatically check for available updates. Available updates download automatically if your device is connected to Wi-Fi and a power source.
3. If an update is available* you can tap Download to download the update.
4. After the download has completed tap Install to update your iOS.
Some iOS updates may not available as over-the-air updates. VPN or proxy connections may prevent your device from contacting the iOS update servers.
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