When near a Wi-Fi or Ethernet network, you can connect your Router to avoid Data usage.
Connect your device to your local Wi-Fi or Ethernet network – at home, at a hotel or at a temporary workspace – and conserve your AT&T data plan by directing data traffic from the mobile hotspot to the local Wi-Fi or Ethernet network. You can manage Data Saver using the device touchscreen.
In this tutorial, you will learn how to:
1. From the device home screen, select Internet.

2. Scroll to and select the desired offloading option.
Note: If you are setting up Ethernet offloading, ensure that your ethernet cable is connected in the device and your mobile router.
1. To configure WiFi offloading settings, the device must be set up and you must be logged in to the AT&T Wi-Fi Manager website.
From your device's web browser, go to http://attwifimanager or type 192.168.1.1 into the search bar. Enter your Username and Password, then select SIGN IN.
Note: Ensure that your device is connected to the Netgear Nighthawk M7's Wi-Fi network. For more information, please see the Connect Devices to Wi-Fi or Connect PC or Mac to Wi-Fi tutorials.

2. Select Settings. 
3. Select General, then select Internet.
4. Selectthe desired Wi-Fi network, if necessary, enter the password then select Continue.
