
The current Galaxy Pocket uses a 2.8” screen, 2 Megapixel camera, Bluetooth version 3.0, Wi-Fi and a 832 MHz processor.
Samsung already announced the Galaxy Pocket Duos a couple of months ago. (GT-S5302)
A nice detail to know is, the Galaxy Pocket Plus (GT-S5301) uses Android 4.0.4. Which could mean the current Galaxy Pocket with Android 2.3.6 would be able to get an update to Android 4.0.4.
Of course this is just speculation.
There is no more information available at the moment about the Galaxy Pocket Plus. (GT-S5301)
We only know the rom is from October and is specially for Belgium.
Below the Galaxy Pocket (GT-S5300)
Update
Update research from SamMobile confirms. Cori Plus ( Cori = codename Galaxy Pocket)
(CORI PLUS: GSM850/900/1800/1900, WCDMA 2100/900) (From service Manual)