T-Mobile will loan you an iPhone 5S for a week. Debit card users, beware.

If you think the market for cellphone plans has gotten a little less onerous over the past couple of years, you can pretty much thank T-Mobile. The upstart carrier that’s No. 4 in the U.S. market began the trend of moving away from contract-based plans, returned to a form of unlimited data and allows users […]