Doing a factory reset has some advantages for a few purposes. One of the big ones is wanting to remove all Data from the device.
This is handy if you plan on giving the device to someone else and don't want to give them your contacts or any other information.
In some circumstances it can even be handy to just start over especially if you have some minor issues and you assume the issues are Data related.
If rooted its a great way to wipe the Data and Cache area's to prepare to change the ROM of the device.
1. Lets get started, press and hold power button to turn off your device.
2. Then press volume down button and power button and hold them untill next step.
3. When you will see LG logo on your screen you can release those buttons.
4. Now there should be a recovery mode menu on your screen.
5. Using the volume buttons choose between the option and confirm with power button on wipe data/factory reset.
6. And now your phone will restart itself so please wait patiently. Good job!
A Hard Reset reverts a phone to its original settings and a clean OS (Operating System) removing all data and information added to the cell phone by the mobile phone user.
In essence a Hard Reset erases everything from the phone and puts the phone back to like new condition as though it’s brand new right out of the box.