In order to hard reset a LG GW550, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
LG GW550 device will be brought back to the default configuration of a brand new device.
1. Power up the phone.
2. Open the phone's dialer with a press of a Call button.
3. Enter in this code: (3845#*550#)
4. Press the Call button again.
5. Your phone will now reset and restart. Congrats.