Lifesaver for when your iPhone's home button is broken

...and you know it's hardware-related:

The following workaround makes the iPhone quite usable until you find the time to get it fixed.

1. Go into Settings –> General –> and tap Passcode Lock and set up a passcode on your iPhone.
2. When you are in an app and you want to back out just press your power button twice –> slide to unlock
3. Then tap Emergency Call –> tap the left arrow key at the bottom left
4. Then input your Passcode and you are out to the app and at your home screen.

From these kind folks.