Sprint customers making purchases in the Android Market should soon find one more option from the list of payment sources. Aside from whatever credit cards you may have linked up to your Market account, the option to “Bill my Sprint account” is beginning to show up for those on the network. Select this option and charges will be made directly to your next Sprint bill.
The news makes Sprint the most recent wireless provider to enable carrier billing, joining AT&T and T-Mobile.
via : Sprint rolling out carrier billing -- charge your Android apps to your Sprint account | Android Central