In order to hard reset a LG Cosmos 2, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
LG Cosmos 2 device will be brought back to the default configuration of a brand new device.
1. Turn on the phone by holding down the Power button.
2. Enter Main Menu and select Reset Settings > Master Reset. Confirm your choice by pressing Left Softkey.
3. Type in security code. Default one is 0000.
4. Phone will now reset and restart. Well done.