Sizes range from 7 inches to 10.1 inches running Android Jelly Bean
High-res 13.3-in. tablet converts to laptop and runs Android and Windows 8
Sales kick off June 28; unlimited 3G and 4G LTE data, and unlimited messages, available for $35 a month
But dual-OS concept may confuse average users, please power users
800 series chip will provide better graphics, access to faster networks, support for 802.11ac and LTE Advanced
Price at $100 and two-year contract
Process ensures 802.11ac devices work well with older Wi-Fi products
Faster speeds of next-generation LTE not expected to drive many sales of Galaxy S4 and other smartphones
Brings updated S4 to South Korea this month; U.S. carrier networks not yet ready for any device that supports speedy LTE-Advanced technology
