Speaker is not loud.
When I am driving with helmet I take calls using speaker mode. With this phone I was not able to hear anything.
No noise cancellation and no auto brightness. Build quality is poor. no compass/magnetometer sensor.
8 GB internal memory is insufficient.
SAMSUNG also had to employ some aggressive app management to make up for the limited 1.5 GB RAM. But there is nothing they could do to make up for the lack of storage.
invest your money after analysis all phone`s in this rang. like Lenovo lunch new phone in 2017 in this rang and you also compere with vivo and Gionee etc.