As we reported earlier this week, Sprint just announced that, beginning today, it will offer any customer “at least $100″ off of the purchase of a new iPhone 4S with a new two-year contract and a new line of service. Interested customers can reserve an iPhone 4S online and bring an old iPhone to any Sprint store to take part of the deal.
You can also purchase an iPhone 4S from http://www.sprint.com/iPhone, open a new line of service, and visit http://sprint.com/buyback after receiving your new iPhone to grab a shipping label. Sprint said it will make up the difference with additional account credit if your trade-in is valued less than $100 through its Buyback program. The full $100 credit will be applied within 2-3 billing cycles if you choose to take advantage of the online option.