To the uninitiated, the world of Android ROMs can be more than a little confusing. Since Android is based on Linux and therefore large portions of it are licensed under the GPL, enthusiasts are free to create and release their own builds.
That’s where some of the confusion comes from. When you buy an Android device, it comes with Android pre-loaded of course. Then, when Google releases a new version of Android, it releases it to the vendors and to the phone companies. If your device is really popular and you’re really lucky, you’ll get an update from either the carrier or the vendor. Usually the update comes with some ridealong software, which you may or may not find useful.
Enthusiast-built Android ROMs tend to come out much sooner than official ROMs sanctioned by the manufacturer, and they don’t come with the bloatware either, so they tend to run a lot better. My venerable Samsung Galaxy S4G phone, which is nearly three years old, runs better on an enthusiast-built ROM than it ever ran with the vendor-provided one, and the enthusiast-built ROMs are much more up to date.Read More »Android ROMs explained