Sprint offers the iPhone 6s for $1 a month with trade-in

Sprint has lowered the bar in The Great iPhone 6s Price Race of 2015. Trade in an iPhone 6 at a Sprint-branded store and snag a 16GB iPhone 6s for $1 a month. Or, trade up to a 16GB iPhone 6s Plus for $5 a month. If you need a little more storage i…