T-Mobile raises iPhone 5 down payment by $50, device now costs $150

After a month of offering the iPhone 5 for $100 down, T-Mobile has quietly increased the upfront cost by $50. Even with the price hike, it's still less expensive than on most other carriers, but some type of warning would've certainly been appreciated. As for the rest of T-Mobile's new pricing scheme, its $20-a month, two-year amortization schedule remains intact. Consider us skeptical, but hopefully this is just a case of growing pains, and unannounced promotions won't be part of the UnCarrier'...