Amazons upcoming smartphone will be exclusive to ATT, according to The Wall Street Journal. The e-commerce giant is widely expected to introduce its first ever smartphone at a media event tomorrow, building on its Kindle Fire line of Android tablets. Amazon already has a relationship with ATT; Its unclear whether Amazon will also offer the smartphone through its online store SIM-free or if it will truly be limited to ATT customers, but regardless, the majority of potential buyers are unlikely to buy a phone without a contract.