Sprint to offer $100 towards iPhone 4S upon trade-in

Sprint wants customers to buy the iPhone 4S and is offering a US$100 credit for the 4S to anyone who brings in an older iPhone as a trade. Details of this trade-in offer was published by TechnoBuffalo, who received it from a trusted source. This offer is supposedly available to both new and existing customers who agree to a new two-year contract and will last until June 30.

This article was originally published on Tuaw.