OverviewSamsung SM-G155SGalaxy Folder 3G

Turn on your phone. Enter the following code: *2767*3855#. Press the Call button to finish "data reset". After a Factory reset through code, your phone data will be deleted.

The device must be on. Go to the "Settings". In Settings choose "Backup & Reset". After that, go for "Factory data reset". Press "Reset device" to finish...

Turn on your device and open "Settings". In Settings select "About Phone". Click on "Build number" seven times and go back to "Settings". Finally, select Developer...