We bought a used smartphone (samsung galaxy ace), and was suprised that it had a version name:
cm7-democracy final edition 2012 (2.3.7 android)
We wanted to reset it in the "Backup / reset" menu in the Settings.. but it didn't allowed us to do it.. no plus menu came up when we pressed the "reset to factory defaults"
Question: how can I reset it to factory default? (with or without leaving the CM on the phone!) - we just only want to wipe the personal data from the phone, as it is a usual thing to do when we would only have a stock android on it.