So bad I can’t upgrade windows 10 other issues are very bad so next time I have been not buy any windows phone. Don’t buy this phone. I just gave mine to service centre because mobile was dead. And Now they are saying that the Lumia 638 Model is not in service anymore so they are replacing my mobile with Lumia 630.It does not have a Proximity Sensor.bed in performance.phone was not playing any video.very bad phone