Xiaomi redni 4A is good smartphone for lowest budget user.
and compare to price xioami company give to more then other company.
good result 13MP camera results with autofocus system.
battery backup is good for full day user.
Ram is good no one creat hang issue.
letest marshmellow android operating system.
16gb internal rom but u have to only 12gb use left 4gb use operating system it is ok.
but you have option incress your rom with attach memorycard.
good smartphone go for it.