All thing is good about this phone like
13mp rear camera is very Nice ( HDR mode of camera is excellent)
5mp front camera is also doing very good job
Upset about the external store, there is no external micro sd slot ( But you can use OTG for external storage)
Xiaomi Mi4 comes with single sim, there also missing dual sim slot
One more issue about this mobile that the handset does not support 4G network
Overall the perfomance of this phone is too good
The battery backup is also good of this mobile