What are the uses of AR core services and why we can't use Google camera in Samsung plz fix this

Need better battery backup....it's the worst even having 4000mah battery, it doesn't fill my whole day recruitment...i think i have to shift to mi... we r paying 20000 bt still we don't have 4k video recording. Shamesung # fix this ...

From the last few days ,i am having these problem...hate Samsung..do u get any kind of enjoyment by disturbing your customer....fix these fast 

Nature's beauty captured in A50 frame