Exclusively for Prime members, Amazon offers preorders of the Unlocked LG G6 32GB 4G LTE GSM/CDMA Android Smartphone with Lockscreen Offers and Ads in Platinum for $399.99 with free shipping. That's $50 under the lowest price we could find for this phone without lockscreen offers. (For further comparison, it's also tied with our September mention of a similar model that was only GSM unlocked.) This phone is expected to be released on November 9.

This IP68 water-resistant phone features a 5.7" 2880x1440 IPS touchscreen LCD with Dolby Vision HDR, Qualcomm Snapdragon 821 2.35GHz quad-core processor, 4GB RAM, 32GB storage, dual 13-megapixel rear cameras, 5-megapixel front-facing camera, 4K HDR video recording, 802.11ac wireless, Bluetooth 4.2, microSDXC card slot, USB-C, fingerprint sensor, and Android 7.0 (Nougat).

Note: Free-trial Prime members are not eligible for the price above. However, free-trial customers who purchase this phone during the promotion for $638 can receive a $238.01 Amazon gift card if they become paid Prime members when their trial period ends.