HI Iam Using tp-link wifirouter archer a9 . Iam Facing Slow Speed on Wifi2.4ghz on all tp link archer a9 devices,having extreme slow speed and unstable connection . Iam using isp connection having spe

I am using tplink router archer a9 ..I having slow speed on wifi...havung the speed is fluctuations ..un stable connection...I am using isp 50mbps ..in lan I am getting 50mbps speed ....but in wireles