If your home button is not working or is broken, then it can be really inconvenient using the iOS for the phone. Here we are with different ways in which you can replace the functionality of the home button if there is no repair option at all.
There is a built in home button in an iPhone that you can switch by going to settings.
Go to settings Settings -> General -> Accessibility -> AssistiveTouch.
Then click on AssistiveTouch, turn it on, you will see a circle overlying the iPhone display.
You can tap the Assistive Touch circle and you will see the icon menu. Here the Home icon will be an alternate for the physical home button. You can also tap and hold Siri, and double tap to switch apps by app switcher. And to return to home, tap once.
You can easily recalibrate the home button using these steps.