Samsung unwraps skinny, octacore, full-metal 5.5-inch Galaxy A7

Summary: New eight-core smartphone fills out Samsung's A-series line-up. Samsung has followed up its full metal-bodied Galaxy A3 and A5 handsets with a slightly larger 5.5-inch sibling, the Galaxy A7. The Galaxy A7 rounds out Samsung's line of Galaxy A-series smartphones, introduced last year,…