In order to hard reset a LG LG 510w, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
LG LG 510w device will be brought back to the default configuration of a brand new device.
1. Press-hold the Power button until the phone turns on.
2. Enter Main Menu. Choose Reset Settings > Master Reset options.
3. You will be asked to enter security code. Default code is 0000.
4. Good job! Wait for your device to reset and restart.