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.
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. To begin hold down power button to turn off your device.
2. Then aimultaneously press and hold the following buttons: Volume Up button + Home button + Power button.
3. When you will see SAMSUNG logo you can immediately let go of the buttons.
4. Now you should be in Recovery mode menu.
5. By using the Volume buttons navigate your way to the Recovery Mode menu, wipe data/factory reset option and press power button to select it.
6. Done! now your phone will restart and will be ready to use very soon.
Despite the focus on the hardware issues, just like with the factory reset, this process is pretty invasive.
Since hardware and software work hand in hand, the action will still erase all the data stored on your smartphone.
Apps will also be uninstalled and settings will once again require a detailed restore and personalization.