Q: Home & start button are not working

Hi gabincelano,

Welcome to the Apple Support Communities! I'm sorry to hear that you are having these issues with your iPhone after a recent update. I'm a bit unclear on the exact nature and scope of the issues you are describing, but if you are having issues with the buttons and/or the touchscreen response on your iPhone, you may find the troubleshooting steps outlined in the following articles helpful:

Get help with buttons and switches on your iPhone, iPad, or iPod touch - Apple Support

If the screen on your iPhone, iPad, or iPod touch doesn't respond to touch - Apple Support

Regards