The LG K20 V is one of the least expensive Android smartphones available from Verizon Wireless. This low-cost handset features basics such as a 5.3-inch 720p screen and entry-level Snapdragon 435 ...
The K20 V doesn't have an always-on display, but it does have LG's KnockOn and Knock Code for waking and unlocking the phone. KnockOn will wake the display whenever you double tap the K20 V's display.