- Verizon Wireless is offering Up to $300 Verizon Credit when you trade in your Old phone. New customers will get a gift card and existing customers will get an account credit. Credit applied over 24 mos & begins w/in 2-3 cycles. Eligible phones for $300 trade-in value: HTC One M9, iPhone 6, iPhone 6 Plus, iPhone 6S, iPhone 6S Plus, LG G4, LG V10, Galaxy S6, Galaxy S6 edge, Galaxy S6 edge+ and Galaxy Note5. Exclusions apply.