Pay by phone: More merchants embrace direct mobile billing | Payments 2.0 |

Charge it to my phone. It's shoppers' new mantra as wireless carriers let you tack on charges — racked up at online stores — to your bill.... BilltoMobile, Boku and Zong (owned by PayPal) are luring online businesses to try their mobile payment software as an option for customers who don't have a credit card or can't be bothered with punching their credit card digits on a Web page or an app