In order to hard reset a BLU Gol, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
BLU Gol device will be brought back to the default configuration of a brand new device.
1. Switch on your device by pressing and holding the Power button.
2. Adventure time! Go and navigate through Menu > Privacy > Factory Data Reset and, eventually, to Reset phone.
3. Accept the action. Your phone will now reset. Huzzah.