A:Answer I am an AT&T Customer, and I got an AT&T Samsung Galaxy S8, meaning that it has the Google apps from Android, the Samsung apps that Samsung adds as apps when they personalize the operating system, and AT&T adds their apps when they personalize the operating system. This may sound frustrating, but AT&T's spam call blocker and drive mode apps are fantastic. Anyway, I bought the AT&T version of the phone in a Best Buy store at the AT&T kiosk in the store. I used a payment plan because I was eligible for upgrade. So my phone bill will increase by a small amount for a couple of years. In the store, I only paid the tax on the transaction.