QUOTE=cstanhwz;93506654]OK, from the LG G Flex 2 userguide.
"Cheese shutter: Allows you to take pictures with voice commands. When on, just say "Cheese", "Smile", "Whiskey", "Kimchi", or "LG" to take a picture"
Think can get most answers from the user guide.
# hotcurves – easy to hold and operate without the need for side buttons
# whyedgehalfway – It is better to curve all the way
# LGGFlex2 – Latest, greatest, most flexible flex phone from LG
# LGMobilePhotography - Take photo anywhere with your LG G Flex 2
# SELF HEALING TECHNOLOGY – self healing technology to fix minor scratches and blemishes
# 13MP OIS+ Laser AF CAMERA – touch and shoot on the screen to take steady and amazingly sharp and focused professional photos with optical image stabilization
# 5.5" full HD curved POLED – provide optimal viewing with great depth, contrast and colours
# Qualcomm Snapdragon 810 – Powerful octa-core 64bit CPU for next generation Android and apps computing
# lollipop – latest and greatest Android 5.0.x
# accelerated charing - charge to 50% in about 30 minutes
# PLATINUM SILVER AND FLAMENCO RED – Erm…Why no white?
# knock knock – Who’s there? Most ingenious way to wake your phone
# at least 50KG – withstand 50Kg or more abuse without giving way. Provided the phone is placed on the floor lol
# GESTURE SHOT & GESTURE VIEW - simple hand gesture, smile, voice command to take photo. Gesture view display photo gallery automatically when LG G Flex2 is lowered from position
# Cheese shutter - Take pictures using voice command like just say Cheese, Smile, Whiskey, Kimchi, or LG to take a picture.
# Copyrights to cstanhwz[/QUOTE]
quite common this feature i mean the selfisx

... sony or fujifilm can detect smile face