yes. It's tuned off by default and I have not changed it. Thanks for reply.@ponnitheunreal He stated that he is getting 400 Mbps on wifi. So, i guess it's not QoS which is called as bandwidth profiles on gateway.
@avirendra bandwidth profiles aka QoS is turned off by default. So, even if u reset the gateway the option will be off by default. But still i guess it's better to double check. It's in advanced option.