It's worth mentioning that you could also remove lock screen ads by disabling your lock screen altogether, but the risks far outweigh the benefits, so you really shouldn't do this. (android.gadgethacks.com)
On July 10, the device will be available ad - free on Amazon for $ 229, or with lock screen ads for $ 179.99. (androidauthority.com)
Starting tomorrow, February 7, all phones on the Amazon Prime Exclusive list will ship without lock screen ads. (androidauthority.com)