How To Get Apple To The Latest Version?

Go to Settings > General > Software Update. Tap Automatic Updates, then turn on Download iOS Updates. Turn on Install iOS Updates. Your device will automatically update to the latest version of iOS or iPadOS

https://support.apple.com/en-us/HT204204#:~:text=Go%20to%20Settings%20%3E%20General%20%3E%20Software,version%20of%20iOS%20or%20iPadOS.

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If you don't have iTunes installed on your computer, download iTunes from the Microsoft Store (Windows 10).

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If you downloaded iTunes from Apple's website

Open iTunes.

From the menu bar at the top of the iTunes window, choose Help > Check for Updates.

Follow the prompts to install the latest version.

https://support.apple.com/en-us/HT201352

How do I update to latest version of Apple?

Go to Settings > General > Software Update. Tap Automatic Updates, then turn on Download iOS Updates. Turn on Install iOS Updates. Your device will automatically be updated to the latest version of iOS or iPadOS

https://support.apple.com/en-gb/HT204204

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Simple: Click Settings> Click General> Click Software Update. Click on Download and Install

If you phone has a password, do not forget to provide the password. And you are good to go.

This link will be helpful:https://youtu.be/0Yb38djl4vs