Everything you need to know about the Samsung Galaxy S8 launch The device comes in two models. The 5.8-inch Galaxy S8 and 6.2-inch Galaxy S8 Plus. The Galaxy S8 comes with a 12-MP back camera and 8-MP front camera. The "infinity display" has sleek, curved edges. Memory: 4 gigs of RAM, 64 gigs of onboard storage, and an expandable SD card slot. The S8 has a 3,000mAh battery and the S8 Plus has a larger 3,500mAh battery. The S8 contains Bixby, Both are available for preorder on March 30th and will be shipping in the US on April 21st.