Android Backup and Reset Utility

Your Galaxy Nexus phone comes complete with its own Backup & Reset app found in the Personal section of your phone’s Settings utility. If you check the “Back Up My Data” option, the Wi-Fi networks you’ve visited, their settings and their passwords are copied to your online Google account. The Backup & Reset app protects other data on your phone such as your contact list, browser settings, bookmarks and email account information. The backup process occurs in the background and won’t interfere with the normal usage of your phone. If you reset your phone or purchase a new Android phone, your Wi-Fi settings are restored once you sign in with your Google account. Writer Bio

How to Back Up Wi Fi Passwords   Settings With a Samsung Galaxy Nexus - 8