In a new way to lure new customers to its network T-Mobile announced today a new plan that will let anyone test an iPhone 5S for free for an entire week. During the week long test you will get unlimited data service. After the seven days are up the person then chooses on weather or not they want to switch to T-Mobile for good. The one catch is you will have to give them your credit card number and if you don't return the phone after seven days, you will be charged $700.