Before disposing of your PS Vita system or buying a replacement, first delete your Sony Entertainment Network account and other information by performing the procedures in this section. This helps you to protect your personal information and prevent its unauthorized use by third parties.
Backing up your information
As necessary, back up your PS Vita system data on a PS3™ system or a computer. This allows you to restore the backed up information on a new PS Vita system. Use 
(Content Manager) to back up and restore data to your PS Vita system.
Deactivating your system
You cannot deactivate your PS Vita system after you dispose of it. Because the number of systems that can be activated for an account is limited, deactivate your system before disposing of it.
While you are signed in to PlayStation®Network, tap 
(Settings) > [Start] > [PlayStation®Network] > [System Activation] and follow the on-screen instructions.
Restoring your PS Vita system
Restoring a PS Vita system restores settings to their default values and deletes all data from the system memory.
Tap (Settings) > [Start] > [Restore] > [Restore the PS Vita System] and follow the on-screen instructions.