If AT&T internet is not working correctly, you are suggested to make sure that your computer is connected to your gateway, and the connection is active. To get the benefit of AT&T internet, you could either be connected with an Ethernet cord, Wi-Fi connection, or both. Follow the next point if your problem is related to the speed of the internet. However, numbers of things are there that can impact the speed of your internet. Today we will discuss a common method to deal with the speed issue. Is your internet slow? 1. Unplug your gateway for 20 to 30 seconds 2. Do you have an internal battery backup? 3. If yes, remove the battery 4. Re-insert the battery 5. Then plug the gateway back in 6. Wait for the lights to stop flashing Have you done with your internet data usage? Is your AT&T internet not working ? If your AT&T internet is not working, you are suggested to estimate your internet data usage.