AT&T Internet Features

I was looking into getting a Wi-Fi extender and wasn't sure if it would be a good idea to get a dual band Wi-Fi extender or just a normal 2.4ghz. I might just get a dual band extender anyway in case something upgrades later down the road. But being everything runs on Wi-Fi now and some things are cl

I live in an apartment building. I have 3 Internet-enabled devices online -- router, laptop, & phone. When I run a Wi-Fi scan, it is picking up EIGHT devices. I am concerned that when I replaced my router last year, perhaps the Wi-Fi ended up not locked. I cannot figure out where to find this in