Hi, to do the trade in you go here. Verizon will send you an addressed envelope to mail it in. When you go to the above link, it will ask questions:
A promotional trade-in offer is available for customers who purchase a new Apple iPhone 6 or Apple iPhone 6 Plus with Verizon Wireless and submit a trade-in request for an iPhone (4, 4S, 5, 5C, 5S) that is in good working condition by 9/30/14.
Are you purchasing a new Apple iPhone 6 or Apple iPhone 6 Plus with Verizon Wireless and submitting a trade-in request for an iPhone (4, 4S, 5, 5C, 5S) that is in good working condition?
Customer must be in good standing at time of trade-in. Gift card may take 4-6 weeks only for these promotional trades.
Is the Activation Lock turned off (e.g. Find My iPhone)?
After filling it out, Verizon will offer you a price for your phone (for the iPhone 6 promo, should be $200 for iPhone 4/4S/5/5C and $300 for iPhone 5S). You'll have 30 days to send it in to Verizon in order to get the gift card for your phone. Here's the fine print from the above link:
Antes de enviar tu dispositivo, ten en cuenta lo siguiente: