The iPhone 7 home button:

Diagnosis justifying the change of your home button:

You can replace your home button if you have the following problems:

• The home button is cracked
• The home button is broken
• The home button is scratched
• The home button does not work anymore

WARNING, if you replace the Original Apple home button, the Touch ID function will no longer work. Only the Original Apple home button set at the factory can work with the motherboard that goes with it.