No, this is just a wifi router / access point. If you plan to use it to access the internet, you will need to connect the internet service to this device.
Does not provide internet service, it just allows you to use your internet service wirelessly throughout your home. You still need to contact a cable/telephone/internet provider.
I am using this with a separate (external) cable modem on Comcast/Xfinity in a family member's apartment. I am not familiar with AT&T, but given that this is only a WiFi+Router (does not have a built-in cable modem) I would be surprised if it didn't work (assuming you have a working cable modem). It can be configured for dedicated/assigned IP or DHCP (I'm using DHCP with Comcast/Xfinity). So far, it seems like a good WiFi router for the price. It is being used in a fairly small (5 room) apartment, but the signal seems to be good throughout.
This is a WiFi access/router plus wired router. It provides the local IP assignment to multiple devices (both over WiFi and wired). It does not include a cable modem.
Yes. I am using this modem with AT&T internet connection and UVerse phone service. No problems. Also connects to my Internet enabled HD TVs without any problem.
First of all. I recommend that you setup the router to broadcast only the 2.5GHZ band as the 5GHZ band struggles when there are walls or other objects in the line of sight of the router. Second, make sure you are connecting to YOUR router sometimes routers will come preset with a generic name. Example: NETGEAR, LINKSYS, ETC. I recommend you change the routers wireless broadcast name. Third. You might be out of reach of the router I recommend to purchase a extender to extend your signal downstairs.
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Thick walls and floors can block wifi signals. If you can run an Ethernet cable through the floor you can solve yout issue. Or perhaps a longer range modem like the Netgear Nighthawk models can carry the signal. They are more expensive, but rock solid for their function.
Use a wi-fi extender so you can receive a signal where your laptop is located. http://www.bestbuy.com/site/netgear-ac750-wi-fi-range-extender-wall-plug-white/3055085.p?skuId=3055085
This router has 4 Ethernet ports and WiFi. I used 1 port to connect a 5 port switch. So mine currently has 3 desktops, a network printer, a NAS unit on Ethernet and a smart TV, 2 cell phones and a laptop on WiFi. No trouble at all. The WiFi is dual band plus it has a dual band Guest WiFi. I bought the N600 for it's in house range and price point.
Absolutely! I have COX cable myself. Make sure to call and authenticate your equipment with them. Also, they don't have modems to rent, so you'll need your own.