@Janetsampson803 if you’re using the same router that you were with BT then nothing has changed except for the incoming line is now by EE and not BT that doesn’t effect the WiFi connection to the router. It’s nothing to do with changing over to EE.
You need to call customer support and explain your router has a fault with its WiFi signal.
To contact EE Customer Services dial 150 From your EE mobile or 0800 956 6000 from any other phone.
