How to delete all content on my Samsung Galaxy S II 4G

Click each step to see the action. You can also click the picture or use the arrow keys.

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This feature lets you erase all content and settings from the Samsung Galaxy S II 4G.
Warning: all media, data and settings will be erased. This action cannot be undone.
1. Touch Applications.
2. Touch Settings.
3. Scroll to and touch Back up and reset.
4. Touch Factory data reset.
5. Touch Reset phone.
6. Touch Erase everything.
7. The phone will reboot.