Performing a master rest on the Samsung Galaxy S II requires the user to select the Factory Data Reset option from the phone's internal settings. No technical skills are required to perform the master reset, but a password protected phone must be unlocked by the owner before performing the reset.Continue Reading
A master reset restores the Samsung Galaxy S II phone back to factory state, and it permanently erases all data, including personal preferences, contacts, messages, pictures, videos and apps that have been saved to the device. Before performing the reset, backup any important data.
From the main screen, tap the Menu icon and then the "Settings" icon.
From the settings screen, tap "Privacy" and then "Factory Data Reset."
Tap to place a check in the box "Format USB Storage" to remove all saved media and any other applications saved on the SD memory card if there is no desire to save that data. Enter the security password if the security option is enabled. Tap "Erase Everything" to completely erase the data from the phone. Once this is performed, there is no way to retrieve the data.
When the deletion is complete, the phone will power down and restart. Once the phone has restarted, it will be reverted back to factory state.