T-Mobile recently announced the HTC One S and it looks like the deals are already starting to flow in. the best deal for the handset might be offered by Costco. Reports are coming in that the company will be offering the T-Mobile HTC One S for only $189. This deal also includes a $25 Costco Card and all you have to do is signup for a new 2 year contract. You should be able to purchase the device on launch day from Costco on April 25th.