I have a NetComm wireless router which has built in Wi-Fi. I don't know how powerful it is or its range but it doesn't seem to like walls. I have had trouble with my T2100 Freeview Plus device in my lounge, only getting about a 73% signal. When I moved the router a few inches from my computer desk onto the floor in the hallway, the signal suddenly increased to 89% and I was no longer getting the same issues. I would rather not have to do this though every time I want to use a wireless device though.