An unannounced Samsung (005930) smartphone has been detailed on a website run by a Vietnamese mobile retailer Mainguyen. Referred to as the Galaxy Win I8552, the handset is expected to launch next month as Samsung continues to expand its mid-range Android smartphone portfolio. In terms of specs, the retailer lists a 4.7-inch Super AMOLED display with WVGA resolution, a quad-core 1.2GHz Snapdragon processor, a 5-megapixel camera, dual-SIM support, a 2,000 mAh battery and Android 4.1.2 Jelly Bean. Two images of the upcoming Galaxy Win follow below.