One of the things that sets Google’s Android Market apart from Apple’s iTunes store is that every time you purchase an Android app you have to make an immediate payment with Google Checkout. Apple just adds purchases to your iTunes account and sends you a regular bill.
T-Mobile Android customers can already choose “carrier billing,” as a checkout option, which will simply add app purchases to your monthly phone bill. But it looks like Google is getting ready to roll out carrier billing for other phone networks soon.
An update to the Android Market terms now adds “authorized carriers” to the list of payment options. It seems likely that users will have a choice of using Google Checkout or billing their carrier, rather than being forced into carrier payments.