Add a virtual Home Button when the Physical is Broken
Overview
Adding a Home button icon on your screen can replace the physical home button when you need it. The physical home button can wear out and in the meantime it would be necessary to have the virtual one available.
Step 1 - Tap 'Settings'
See Below
Step 2 - Tap 'General' then 'Accessibility'
See Below
Step 3 - Turn on 'Assistive Touch'
To see how to mimick other buttons including the volume button read this discussion.
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