@SayeemAhmed Remove the Deco X10 and add it again.

@SayeemAhmed What's your Deco X10 firmware?

@SayeemAhmed This is 2.4 GHz with 20 MHz

@Solla-topee They said that...... Hi, Many thanks for your valued reply. This problem cannot be solved temporarily, I hope you can understand that it should also be difficult to solve in the future....

@m5owner First of all delete the already installed app from your phone and then install the app which has heatmap option.

@PowerH You can install the firmware 1.4.0 from the link below. 👇 https://community.tp-link.com/en/home/forum/topic/856648?moduleId=39