Sony Xperia SP was planned to be released on April, 30th 2013. This means that this phone isn’t yet available on the market. If you want to a kind of consideration what the phone “inside”, just take a look for a while the User Guide that talk about all the functions and applications provided by the Xperia SP. If you had already owned the phone, you can also make the User Guide as your reference help.
This Sony Xperia SP will be available in three version series: C5302, C5303 and C5306. There is no significant difference between these series, except for the “frequency” of their data networks technology which is related with the mobile carrier that you had.