@Decouser10011 I think your Deco M4 is using custom firmware by your ISP you have to call them and tell them to update your Deco M4 to the latest firmware 1.7.0 or you can update it by yourself by...

@David-TP I do factory reset to all Satellite Units and then do setup again and now all the Satellite Units using the same security protocols same as Main Unit and now Fast Roaming is working on...

@David-TP That's my tablet built-in option to check wifi features which is called Intelligent Wifi and i have'nt check on other devices.

@David-TP I'm also facing the same issue my connected clients devices name are back to default after every few hours and i got the notification of Deco App XXXX device is connected to Deco because...

Now i understand why security is changed because im using Fast Roaming and Fast Roaming is not applicable on Satellite Deco Units that's why security protocols are different on Main Deco Unit. Here...

Hey TP-LINK My Samsung tablet detected different Wi-Fi security protocols are compared to my brother tplink router. My Deco mesh system wifi name is AR-TP and my brother wifi name is A9-TP