T-Mobile has introduced Test Drive, a new program that lets prospective users try out the T-Mobile network for free while using an iPhone 5s. Upon signing up for the program, T-Mobile will send you an iPhone 5s, which can be used for free for seven days to make unlimited calls, texts, downloads, and so forth. After that time, the phone must be returned in good condition to a T-Mobile retail store. The iPhone 5s must be ordered online — it will be…
