Best Buy is offering a trade -in scheme where customers can upgrade their old smartphones for a minimum $100,  and buy a new iPhone 5S or 5C model, starting Oct. 11 and running through the whole week.

Best Buy, one of the leading retail stores in the United States, is offering a new trade-in program allowing customers to get at least $100 value for an old working smatphone towards a new iPhone 5S or 5C model. The new offer will kick start Friday, October 11 for those interested in an iPhone 5C and customers can avail the offer starting October 13, for the iPhone 5S model. The offer lasts through October 19.

 TechnoBuffalo citing a trusted source  said the the retailer will offer a minimum $100 gift card in exchange for any working smartphone. Moreover,  the gift card can only be applied toward the purchase of a new iPhone 5C or 5S model with a two-year contract on supported U.S. carrier.

Customers can only avail the minimum credit, provided their old smartphone is in good working order and should not be damaged in any way. The new offer cannot be clubbed with the current $50 Best Buy Gift Card offer. The offer will be available only in select Best Buy stores.

The trade-in value for an old smartphone can increase with original packaging and accessories.

With the deal, customers can snap an iPhone 5C 16GB model without any down payment as the device is listed for $99 on Best Buy's official site. However, the iPhone 5S 16GB would need an extra $100 down with a 2-year contract.