STC, the largest telecommunications company in Saudi Arabia (with well over 100 million subscribers across various Arab states), has launched support for Play Store carrier billing. Now people in the region can pay for goods by adding the fee to their next bill, rather than keeping a credit card on file. Customers can find the feature highlighted directly on the carrier's site.
You can access carrier billing by going to purchase an app and, when the payment window pops up, changing the method. Don't feel bad about committing to pay for something later instead of right away. It's not like shopping with a credit card is all that different. Get the apps you love, pay them off when you can, and everyone's happy.
Thanks, Adnan Ashfaq.