Now Samsung has added the Galaxy S4 Mini to its official website.
Samsung Galaxy S4 Mini four Versions:
GT-9190 W-CDMA / GSM
GT-9192 LTE / W-CDMA / GSM (support dual SIM)
GT-9195 LTE 4G
GT-9198 TD-SCDMA/GSM for China
Samsung Galaxy S4 Mini will have a 4.3-inch qHD Super AMOLED display with 256ppi, 1.6GHz dual-core processor, 1 GB of RAM, and well 5-8 mpx camera with 720p resolution and Android 4.2.2 Jelly Bean OS with TouchWiz UI. It will be launch in June or July, 2013.
Source Blog of Mobile