You can then download and install the software update to your phone.
If you've switched this feature off then you should search for updates manually.
To do that, just click the "Backup" button near the bottom of the screen, then wait about 10 minutes for the process to complete.
Should you ever need to restore this backup, the process is equally simple—just click the "Restore" button, then select the backup you made, and Smart Switch will handle the rest.
You should also make sure that you've backed up your personal data, like the contacts that are stored on your phone.
One of the first things you should do is create a backup of your existing firmware, data, and apps.
Next up, you'll get a message detailing the update process.