Mobile social network PapayaMobile has partnered with Zong, Billing Revolution and Adknowledge’s Super Rewards to offer a monetization platform for Android developers.

British apartment and house-share Web site Spareroom.co.uk has added a new mobile purchasing option for consumers via its mobile Web site.

Payfone Inc. has closed an $11 million round of Series B financing, which is one of the biggest investments in the mobile payments space to date.

NBC Universal Television Consumer Products Group has launched a mobile storefront that lets consumers buy content from their favorite NBC Universal television shows on their mobile phone.

Zong has launched Zong+, an online mobile payments platform combining carrier billing with credit, debit and prepaid cards.

Consumers are willing to use their handsets to buy almost anything, but when it comes to billing, Americans tend to trust their credit card company more than their wireless carrier.