Lenovo-owned Motorola launched its Moto X4 mid-range smartphone at the IFA 2017 trade show in Berlin this September. The handset’s availability is limited in the United States. Motorola did say that it will be available unlocked via the company’s website. There’s also an Android One version of the Moto X4 that’s available on Project Fi. Starting today, there’s also an Amazon Prime-exclusive version of the Moto X4.
Amazon sells several handsets under its Prime Exclusive brand. They’re priced slightly lower than what they would normally cost but there’s a reason for that. Customers who pick up Prime Exclusive devices have to see ads on the lock screen. If they are comfortable with making this trade-off in exchange for a lower price, then Amazon will happily sell them a discounted handset.
These Prime Exclusive smartphones aren’t bootloader unlocked so it’s not terribly easy to flash a custom ROM or modify the firmware in a way that no ads are displayed on the lock screen but it’s not like people don’t try to find a way around that.