@SayeemAhmed Just factory reset your all Deco units and setup again.

@David-TP Please check my issue also and when i go to IPTV and enable it so the app crashed.

@SayeemAhmed What's the problem now?

@SayeemAhmed Follow the steps from the link below. https://www.tp-link.com/us/support/faq/2958/

@SayeemAhmed First of all you have downloaded the wrong firmware file of Deco M4 you downloaded the V4 file not V2 and if u want to use this firmware use PC or Laptop to install via recovery mode and...

@David-TP Deco App is showing that my phone is still connected to Deco in the client list but i'm on 4G not WiFi my phone is Redmi Note 11 and i have reopen the Deco App and also refreshing client...