Sure, but not by exchanging it with Verizon. You can sell the S5 and buy a 5s or 6, or you can advertise here in The Marketplace - Buy, Sell & Trade - Android Forums at AndroidCentral.com for a sale or trade. Start the topic with WTS/WTT (for "want to sell or want to trade") so people looking to sell won't waste time looking to see if you want to buy a phone.