Phone frame made of phosphor so it glows in dark
#wiko

Rear buttons & rear notification LED
#LG

5 camera lenses of same format for post-photo depth manipulation and HDR/lowlight
#nokia

Invisible camera and leather back
#oneplus

Facebook launcher prebuilt in system
#htc

Flush (under single glass piece) cameras
#LG

Built in projector
#samsung

Water effects on lockscreen
#samsung

The first Samsung phone with the famous curved edge.
#samsung

Glass antenna bands and camera island
#Xiaomi

All around "surround" display
#xiaomi

Outwards folding display
#Huawei

phone without buttons and holes
#vivo

Sapphire glass screen
#HTC

Popup camera
#xiaomi

Multi-layer screen
#Motorola

Phone with only bottom chin
#sharp

Flip camera
#Oppo

Hand unlock feature.
#LG

Intel x86 powered phone
#asus