The leaked memos discuss a mobile game designed to help employees practice their sales skills, and a Grab & Go suite available through the company's electronic learning system. However, the most significant thing is the date.
These selling aids go live on Sept. 21. It could just be a coincidence, and since they don't have an iPhone, T-Mobile may just be going along with the crowd that says the iPhone 5 will launch in retail on that date, but it's still a key indicator.
In May, T-Mobile said it would be moving to make its network iPhone-compatible.
The 3G frequencies on the current iPhone are incompatible with T-Mobile's network, meaning that the unlocked iPhones its customers have are running on 2.5G, or EDGE.