It essentially resets the internal hardware state so that a full firmware version (like the later v40.0.003) can be written to the device. Hardware Context: The Nokia 5530 XpressMusic Go to product viewer dialog for this item. Released in August 2009, the
: The ENO image provides a basic boot environment to resolve severe software issues like boot loops, "Contact Service" errors, and dead USB scenarios . It essentially resets the internal hardware state so