Great news for content owners who wish to charge via mobile applications, Amazon have today announced that the flexible payment system is going to be available via mobile
Ill simply let the pricing do the talking and you can decide which you want to use
Amazon
https://payments.amazon.com/sdui/sdui/business?sn=devpricing/fpspricing
Bango
http://bango.com/products/payment/payment_network.aspx
looks similar at first glance but then factor in Bangos minimums
http://bango.com/products/payment/world.aspx
Is operator billing worth the extra to everyday end users than Amazon? thoughts welcome in the comments!