Buying an Android app through Google’s Android Market is not a simple matter in parts of the world that do not use credit cards the way we do in the U.S. That’s what Google tells us in this announcement about the new Carrier Billing options for the Android Market.

New Carrier Billing Options on Android Market

Carrier Billing means that the cost of buying an app is billed against your phone bill instead of, say, a credit card or Google Checkout account. AT&T and T-Mobile users have been able to buy apps this way since last year. And, in this country, Sprint joins them now. Carrier Billing is also available through three carriers in Japan: SoftBank, KDDI, and NTT DOCOMO.

Of course, if you are an Amazon customer, you have a third option to buy Android apps: Amazon’s recently launched Android Appstore.