deleting old data on phone that im returning

[Charlie100]

my wife and I received a new samsung phone each, were supposed to send old phones back to sky, how do we delete everything thats on them before returning

[daveNOS]

@Charlie100 The easiest way is to perform a factory reset as that deletes all data, settings and apps.

Factory reset to erase all apps and data

1. Navigate to and open Settings, and then tap General management.
2. Swipe to and tap Reset, then tap Factory data reset, and then review the information.
3. When you're ready, swipe to and tap Reset.
4. If you have a security lock set, you will be asked to enter the credentials.

5. To continue with the reset and delete all information stored on your phone or tablet, tap Delete all.

6. From there, you will be required to enter your Samsung account's password if you have added a Samsung account.

7. Your device will reset; when it turns back on, it will start from the initial setup screen.

[Charlie100]

Thanks Dave NOS, I've got so far but can't remember my password  after deleting. (very much a silver surfer).