Phones sold through Amazon's Prime Exclusive Phone program will no longer display lock screen ads, according to the retailer. The phones, which which were sold at prices substantially lower than MSRP, will instead feature Amazon-centric apps only while retaining (most of) their discounts.
https://www.notebookcheck.net/Amazon-to-drop-lock-screen-ads-from-their-Prime-Exclusive-phones.281662.0.html