T-Mobile has tried its best to disrupt the wireless carrier industry in the United States by offering plans and programs that its major rivals haven’t countered. The increase in new subscribers that Magenta has seen over the past few quarters reveals that this moves are doing wonders for the company’s total subscriber base. One such program is called Test Drive under which the carrier allows potential subscribers to take an iPhone 5s for a spin, albeit for one week only. If they like the device they can keep it or they can send it back without incurring any charges or fees.