Bango, which provides billing and analytics for app stores, mobile apps and websites, today announced that that its integration with Facebook is now live. 

According to a press release, Bango is providing Facebook with mobile web carrier billing in Germany, the U.K. and the United States. The company said it will expand the service to other countries during the remainder of 2012.

Today's news follows on an initial announcement of its partnership with Facebook in February. Integrating Bango with Facebook is aimed at improving the mobile payments flow on the popular social networking site. 

Facebook’s mobile web users can now purchase digital content without needing to send an SMS for payment or enter a credit card number. Instead, purchases can be added to a user's carrier bill. 

Bango is no stranger to the mobile payments space. In addition to Facebook, the company's existing app store connections include Blackberry App World, Opera Mobile Store and operator-led connections to Google Play. 

Bango has also announced an agreement to provide payment services to Amazon and has become a technology partner for MasterCard’s PayPass mobile wallet.

The addition of Bango is part of an aggressive push by Facebook to advance its mobile strategy. The bulk of the company's subscribers now access their accounts on mobile devices. Investors worry that Facebook is unprepared to monetize its service, especially on the mobile, where it is struggling to attract advertisers. 

Facebook CEO Mark Zuckerberg recently called his company "mobile-first" but admitted that it had made some mistakes in the area, calling his bet on HTML5 one of the "biggest mistake we made as a company.”