T-Mobile has recently re-vamped their site. The homepage has been significantly changed, and I'm thinking for the better. As a T-Mobile customer, I can always remember the homepage looking rather nice visually—but it was constantly promoting their latest deal which I didn't care about, nor did I suspect that prospective customers did. If you've ever been on the market for a new mobile phone, you pretty much care about three things.
1. The phones carried by the service provider.
2. The plans/pricing that go with those phones.
3. Local coverage details.
Sure. there are other things—but these are the biggies. And they don't have anything to do with a "promotion of the month". The New T-Mobile homepage nails it by letting you quickly browse the phone models, get details on local coverage, and "price out" plans using an easy to use slider in combination with some other choices. In short, the experience is more closely aligned with how customers think—and what's important to them vs. what T-Mobile wants to be important.