Google rolled out carrier billing for Android apps in the Android Market some time ago, working with a number of networks around the world to make it available to subscribers. It's convenient since it rolls charges right into your monthly phone bill — so convenient, in fact, that the company has expanded it this week to all types of Google Play content: apps, music, movies, and books. Unfortunately, the expansion once again requires that Google work with each carrier individually, so it's not immediately available on all carriers where app billing was already available — initially, T-Mobile in the US along with NTT Docomo, KDDI, and Softbank in Japan are rolling it out. Sprint will be following "soon."
Google Play now lets you charge movies, music, and books to your phone bill on some carriers
Google Play has added direct carrier billing for music, movies, and books on some carriers.