Perform a factory reset on your Galaxy phone

Are you sending your phone in for repair or giving it to a friend or family member? If you need to wipe your phone's data for any reason, you can perform a factory reset. This feature will completely erase your personal information and data to make your phone a clean slate.
Note: Available screens and settings may vary by wireless service provider, software version, and phone model.
Reset the device
Important: Please save any information you need prior to the factory reset because otherwise your personal information may not be recovered. If you have encrypted the microSD card, you must decrypt it before resetting the phone. Otherwise, your phone will not be able to read the data on the card. From Settings, search for and select Decrypt SD card, and then follow the on-screen prompts.
Before you perform a factory reset, be sure to back up your personal data, so you don't lose it all. Get a start fresh by performing a factory reset:
From Settings, search for and select Factory data reset. Next, tap Factory data reset again, and then review the information. When you're ready, swipe to and tap Reset. If you have a security lock set on the phone, you will be asked to enter the credentials. To delete all information and downloaded apps, tap Delete all.

Your phone will reset; when it turns back on, it will start from the initial setup screen.
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