1. To block devices from connecting to your hotspot, login to the AT&T Wi-Fi Manager from a device connected to the Unite Express Network.
   
2. Click on the desired device.
   
3. Click the Block Device button.
   
4. Click the Block device button to confirm.
   
5. To unblock a device, tap Wi-Fi.
   
6. Tap MAC FILTER.
   
7. Select Black list - block all in list from the drop-down menu.
   
8. Click the X button to remove the blocked device from the block list.