T-Mobile issued a direct challenge iPhone owners on Wednesday in hopes of luring subscribers to the Galaxy S 4G. Anyone with an iPhone in the Seattle area is being promised $1,000 if their smartphone can download data faster in a best-of-three test with a third-party app. The promo will also see T-Mobile pay up to $300 for an iPhone trade-in if the user buys a Galaxy S 4G or another HSPA+ phone.