The HTC Detail is a variant of Sprint's HTC Evo Shift 4G. Offered by Credo Mobile, the Android handset offers all the features you'd get on the Evo 4G including the QWERTY keyboard. Also, since it operates on Sprint's network (Credo is a Mobile Virtual Network Operator), you'll be able to access the Sprint's WiMax 4G network. The Detail 4G is $99.99 with a two-year contract.
For more on the Evo 4G see our full review. For more on Credo Mobile, please see our review of one the carrier's earlier phones, the LG 160.