Solved! Go to Solution.
Three finger is not a recommended as doing this may result to removal of some pre-installed applications on the phone.
It is not recommended to use the "three finger" reset (pressing volume down + camera key + menu key and pressing power button) to hard reset your Nokia Symbian^3 device. Doing this may delete some applications (Nokia Store, Nokia Maps, some preinstalled widgets) which cannot in all cases be restored.