At Sprint, buy any smartphone with a new 2-year service agreement and get a $100 American Express Reward Card and free activation with your order. It's at least a $36 savings over our mention from a month ago, which didn't include free activation. Free shipping applies to all orders. Sales tax is added where applicable. Deal ends August 26.

A best bet is the Motorola Photon Q 4G Smartphone for Sprint (pictured) with the $100 American Express Reward Card for $199.99 with free shipping and free activation. (It's the first phone on the page.) Assuming you'll use the credit, that's the lowest total price we could find by $50. Features include a 1.5GHz dual-core processor, 4.3" 540x960 ColorBoost LCD, up to 7.5-hour talk time, 1GB RAM, 8-megapixel 1080p rear camera, 720p front-facing camera, 802.11n wireless, Bluetooth 4.0, and Android 4.0 OS (Ice Cream Sandwich).