I think this is one of the Sony Xperia unlocked phones for prepaid calling plans. Just like to add that I had a phone from this family and it only lasted less than a year (with careful usage and handling) before the edges of the screen stopped working, meaning that I couldn't do things like hit Enter or type the letter "p" or swipe down my notification drawer etc. For under $400, it's good for a very young person or very old person or someone who doesn't know any good phones to compare it to. Because if you know better phones, this is hard to use, even as a backup.