Not happy with your sluggish Samsung Galaxy S3? Welcome to the club. Just like with any other smartphone (or a computer device for that matter), the Galaxy S3 loses its performance over time, for a number of reasons. Unused apps, widgets, junk data (including photos, videos, browser history etc) and different programs clog up your smartphone’s Android OS over time, resulting in reduced performance.
By making sure you have the latest Android OS installed on your smartphone is all it takes usually to ensure a clean and well running system. But sometimes, even upgrading your OS might not solve your problem. In those cases, a factory reset becomes a necessity.
A full-on factory reset will clear everything from your smartphone, including the built-in apps, its data, and all of your personal files. It’s basically like starting from scratch; as if you just bought a new phone.