T-Mobile is a popular provider of phone plans, but is it expensive? The short answer is, it depends. T-Mobile's plans are comparable in price to other providers, and in some cases may even be cheaper. However, their plans can be more expensive when compared to budget providers. Ultimately, the cost of a T-Mobile plan depends on the individual user's specific needs and preferences. They offer a wide variety of plans, and customers may find that they can save money by customizing a plan to their own needs.