[Q] Wi Fi low speed topic

hey guys m using moto g 2014 XT1068
i'm getting 300-400 kBps speed during file transfer with software data cable and xender.... and also in superbeam app
but initially I got 3mbps speed in xender but now slow speed
also slow speed in wi fi downloads..
I'm using kitkat stock rom version 21.11.23
my device is only 14days old....
please reply me