@Anant_Agnihotri Try using iOS device instead of android. Its seem something wrong with deco app on android.

@jrtham All X20 user have a same firmware issue. Slow connection and nothing we can do.

This is the result when using iperf3 on X20 new firmware which is I can say it not improve at all. Wireless speed is still below 100Mbps. QoS already set to standard mode. Not happy at all with this...

@jrtham I just update to latest firmware for X20 which is 1.5.1. Not try to test yet on iperf3. Hope its has an improvement.

@staxza Maybe your ISP required a VLAN settings.

Maybe TP Link R&D busy create new products instead fix existing issue. Very disappointed