News has been flying around lately about all the upcoming Xperia handsets from Sony Ericsson, but have you been keeping track? Here to help you out, is a quick review on the upcoming Xperia models, as well as the current Xperia X1.

The Xperia X1, currently on sale around the world is the first Windows Mobile handset from Sony Ericsson. The handset also features a touch screen and slide out QWERTY keyboard. Camera wise it features an impressive, yet slightly outdated 3.2 megapixel camera.

The next Xperia handset, the X2, aka Vulcan brings the camera up a notch to 8.1 megapixel. Also updated will be Windows Mobile, the X2 is set to use Windows Mobile 6.5. Other similar specs of the handset includes a 3.5 inch touch screen and a QWERTY keyboard.

Images and specs have also been floating around of the Xperia Rachael, which was originally thought to be the X3 although some are suggesting that Rachael is in fact X5 which we’ll come onto next. Currently, the X3 is rumoured to be a mysterious handset, going by the name of Kiki. Not much information on Kiki at the moment apart from the screen. Kiki uses a glass screen with a rear projected image. Xperia wording can be found on the back of the handset, which is the only thing currently that points to the Xperia brand, as there’s no QWERTY keyboard to be found. Kiki is also supposedly running Android.

Also running Android and receiving much more hype than Kiki, is Rachael. Abandoning Windows Mobile in favour of Android has got a lot of people excited. No visible QWERTY keyboard on the handset, but perhaps the increased screen size reflects the absence of it. Coming it at 4 inches, it’s the biggest of the Xperia screens. As for the Xperia X4, no information has been released on it, but perhaps Kiki could be the X4.