User Agent Profiles are one of the best sources to dig for upcoming phones, especially when talking about Sony Ericsson phones. Aside from the WT19i unveiled via UAProfile last June, another unearthed phone, codenamed MT11i, has also been spotted to be an upcoming device for Ericsson. Its size could be standard because of the touch screen that goes by 480×854 pixels. It also shows that it sports an Android 2.3 Gingerbread for its UI. Another highlight in this unveiling is that it would have a Cortex A-8 processor.
Understanding that the Xperia Neo is codenamed MT15i, the MT11i should come close to it when it comes to the size. SE may even have a coding system indicating that M stands for “middle”, S for “small”, and L for “large”, just like the Xperia Arc, being 4.2 inches, codenamed by LT15i, being a large phone already. It may be bigger than 3” and smaller by 3.7”, making it a middle phone.
Source: Phone Arena