The elf was the first touch. It is gsm, it has less ram than the cdma vogue, and it has wifi. So basically the gsm version is called the elf and the cdma is called the vogue.
Now apparently, there is a space on the board inside the vogue but without tech data you can't be sure if the conections are there to support some kind of sim card. I guess if you had an extra vogue to mess with, you could tear it apart and do some surgery and see if you could connect something in there. Even then you would have to obtain and possibly port or rewrite software to recognize what you installed. Then maybe it might work. Try it and let us know if it works!
