Y55s is vivo, s latest budget range device with decent specs and configuration.
Design is very nice and impressive
3Gb Ddr3 based RAM
16 gb ROM expendable upto 256 gb
13Mp Rear facing camera and 5MP front facing camera
5.2 display resolution 720* 1080
SOC is snapdragon 425 chipset
Vivo y55s comes with very decent specs.It is a budget range smarphone with decent features but its own Funtuch Os based on android 6.0 Marshmallow has very interesting unique features like Smart gestures, Smart split, Long screenshots, Screen recording this features make cool this device .
So We can say the y55s has very decent specs in 12450 price point.