If you buy a new phone, or want to dispose of or recycle your old phone for any other reason, here’s how you can remove your personal info and content.
You can restore the original factory settings, but be careful, since this reset removes all data you have saved in the phone’s memory and all of your personalisation.
If you are disposing your phone, note that you are responsible of removing all private content.
To reset your phone to its original settings and to remove all your data, on the home screen, type in *#7370#. If asked, enter your security code.