For Cyber Monday, the US branch of T-Mobile has announced special discounts on iPhones. People buying a 16GB iPhone 6 will be automatically upgraded to a 64GB model; likewise, choosing a 32GB iPhone 5s will get an upgrade to 64GB, and buying an 8GB iPhone 5c will get a bump to 32GB. The carrier cautions that the deal is limited to online purchases only, and only as long as inventory lasts.