The type of goods you can buy with m-payment depends on what kind of m-payment you are using. If you are using remote m-payment, typically you can purchase a wide range of services and digital or physical goods. This includes digital goods like applications, ring tones, videos, wallpapers music, games and transit tickets, as well as physical items like books and magazines from online retail stores that have m-payment capabilities.
If you are using proximity m-payment, then you can purchase goods and services from anywhere that is equipped with contactless readers. See, How do I know if a store accepts contactless payments?