Honestly, I haven't heard of Android having different versions until now, and after checking my phone information, I learned my Android phone version is "4.4.4," which I'm guessing means I have version 4? I have a Droid Maxx Motorola. I knew that much. In general, I personally think that Android is a lot better than systems, such as IOS, like Apple. Both types of systems have good and bad. The plusses I like about Android is that the screen doesn't mess up as often as the other phone system, from what I've seen it's cheaper and easier to navigate, and you are able to share multiple products like cords or earphones (since they recently took out the earphone hole even though you can buy the cord for it) and the companies don't purposefully "damage" Android as often as they do to Apple so that you buy the newest one, which is mostly the same thing as the last one. I have dealt with other systems that wasn't Android and I can't see myself letting it go.