A Sony Ericsson promo poster recently leaked an image of the up and coming, but unannounced, Xperia Duo. We’re still not sure what the full line of specs are but as the name implies, there is most likely a dual-core CPU on board. It’s also possible we can see a front facing camera and slight subtle switch up of icons than what we’re used to seeing on Android devices. The display also looks to be somewhere in the 4.3″-4.5″ range but only time will tell until the full spec sheet comes to light. In the poster, the device lying juxtaposed to the Duo, the Xperia Arc, is as we know a 4.2-inch display. Stay tuned to Talk Android as we dig a little deeper on the device. Once we find more, you’ll be the first to know. Feel free to let us know what you think in the comments below.