<ol>
<li>
BLOCK A DEVICE: From your device's web browser, go to <a href="http://attwifimanager" target="_blank" rel="noreferrer noopener">http://attwifimanager</a>. Enter your Username and Password, then click SIGN IN. 
Note: Ensure that your device is connected to the Netgear Nighthawk's Wi-Fi network. For more information, please see the <a href="https://attwireless.sds.modeaondemand.com/en-us/tutorial/mr1100/att/148022" target="_blank" rel="noreferrer noopener">Connect Devices to Wi-Fi</a> or <a href="https://attwireless.sds.modeaondemand.com/en-us/tutorial/mr1100/att/148023" target="_blank" rel="noreferrer noopener">Connect PC or Mac to Wi-Fi</a> tutorials.
<img src="https://content.sds.modeaondemand.com/authoring/image/e21adeb227b8bd7a495a94e68d6c025fdb1f37789fc62a33eca80cd68a6aa987.jpeg" alt="device 5189/9006412_01.jpg">
</li>
<li>
Click SETTINGS at the top of the page.
<img src="https://content.sds.modeaondemand.com/authoring/image/3b8134e541f996c3232282971c362436d85d0fddcfc1bb2a41c116622d3dbe48.jpeg" alt="device 5189/9006412_02.jpg">
</li>
<li>
Click Security, then click Access Controls.
<img src="https://content.sds.modeaondemand.com/authoring/image/893e111b86e44f707ed6e42972ee16415c0449fea95d17cd20ce7d27c911abc1.jpeg" alt="device 5189/9006412_03.jpg">
</li>
<li>
Select the Enable checkbox.
<img src="https://content.sds.modeaondemand.com/authoring/image/f43debea41f05f84688287929d3a063b117f0b7eca3e6cd57fb8f34e2fca6afd.jpeg" alt="device 5189/9006412_04.jpg">
</li>
<li>
Ensure that BlackList is selected under Filter Type.
<img src="https://content.sds.modeaondemand.com/authoring/image/260c0b09a7b88891e1892b4626f99ac24156cde1170319d804c7e32c570395d0.jpeg" alt="device 5189/9006412_05.jpg">
</li>
<li>
Click ADD under BLOCKED DEVICES.
<img src="https://content.sds.modeaondemand.com/authoring/image/0a13ba6627792027a4ab3093a15dcbe764f7fd87c029e99709f8b193be4a29f8.jpeg" alt="device 5189/9006412_06.jpg">
</li>
<li>
Enter the device's Name and MAC Address. Click ADD. 
Note: To add a device that is currently connected to the network, click the Add icon then click the desired device.
<img src="https://content.sds.modeaondemand.com/authoring/image/12ff7a7a1895f1529cdf1ed8628c18ae5a13fea990072ecf92920a6928243476.jpeg" alt="device 5189/9006412_07.jpg">
</li>
<li>
Click Apply when finished.
<img src="https://content.sds.modeaondemand.com/authoring/image/f430a7a3f73a62657888781293ea4abad1ba4e7f6f3922a3f6621c0ef804a349.jpeg" alt="device 5189/9006412_08.jpg">
</li>
<li>
UNBLOCK A DEVICE: From the Access Controls screen, click the checkbox next to the desired device then click DELETE.
<img src="https://content.sds.modeaondemand.com/authoring/image/90c9ef2cbc1bb76c7b20708f7dabffc2364952aa0cd94691ac2ea17e84bd4a4a.jpeg" alt="device 5189/9006412_09.jpg">
</li>
<li>
Click Apply when finished.
<img src="https://content.sds.modeaondemand.com/authoring/image/98147ee8f5a25f3c885a0cc7ca08c510b3404846c53eca5a35323a5ce631b33b.jpeg" alt="device 5189/9006412_10.jpg">
</li>
</ol>

Block and unblock devices from connecting to your Router's Wi-Fi network.

Block or Unblock Devices

Get smartphone, tablet & mobile device support from AT&T. Select the brand of your phone, table, or mobile device from the list of popular brands.

AT&T Device Support – Select a Phone, Tablet, or Device Brand

AT&T Device, Phone & Tablet Support – AT&T Official Site

Nighthawk LTE Mobile Hotspot Router (MR1100)

/kmservices/v2/contents/[[VALUE]]?app-id=idpui

/kmservices/v2/search?content-type=content_instruct,content_parentinstruct,content_breakfix,content_weblink&description=y&tags=[[VALUE]],region_TX&app-id=idpui

/kmservices/v2/search?content-type=content_instruct,content_busfaq,content_parentinstruct,content_breakfix,content_weblink&description=y&tags=[[VALUE]],region_TX&app-id=idpui

/search/devicehowto/topic-contents/models/[[VALUE1]]/sources/all/topics/[[VALUE2]]?app-id=esupport&rows=1000

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