There is speculation that these models will be a revised version of the Sony Xperia L. That model offers a 4.3 inch screen with resolution of 480 x 800. The model is equipped with a dual-core 1GHz Qualcomm Snapdragon S4 Plus with 1GB of RAM on board. Obviously this is a handset in need of a refresh.
Hopefully, Sony will let us know exactly what to expect from all of these "D"-series models rumored to be coming from the Japanese manufacturer. CES would be a great place to start.
Sony D2004 and Sony D2104 visit the FC
Thanks, Anonymous Tipster!
source: FCC (1), (2) via SEMCBlog