The upcoming smartphone from Sony might get the name Xperia Sola. It's contradictory to the single alphabet naming procedure of Sony that we saw in Xperia S and the rumored Xperia U and Xperia P. Xperia Sola has been trademarked with OHIM and USPTO. These are the trademarking offices of EU and United States respectively.
As you might have guessed, there are no details about the specifications of the phone or any pictures available; may be we'll hear something about it in the MWC 2012. If you're interested to know more about the other rumored handsets, it's here.