Hai friends
this is ramakrishna seniour executive in consumer electronic Y55s tihs model is replace with last year model Y55L
this is 3gb ram with 16 gb internal memory last uear model y55l is 2 gb ram they incesed ram capacity and last year model is expanadble upto 32 gb only this year model expandable up to 256gb with HD display I am not recamend this mobile with 12-13k range
go for honor6x with 3gb ram 32 gb internal memory finger touch sensor with bach dual cam with volte tecnology
Y55s this mobile not much of worthy