In order to hard reset a Fujitsu Arrows M04, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Fujitsu Arrows M04 device will be brought back to the default configuration of a brand new device.
1. Switch the phone off.
2. Press & hold the Volume Down and Power buttons.
3. Release Power when the Docomo logo appears. Release Volume Up when Recovery Mode pops up.
4. Now select Factory data reset using Volume and Power buttons.
5. Lastly, select Yes. Done.