<p>Download the free ActiveArmor app to: </p><ul><li>Help block spam and fraud calls</li><li>Secure your device and the stuff on it</li><li>Get notified of data breaches</li></ul>

Get the AT&T ActiveArmor app

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

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

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Here's your device's complete instructions, specs and more.

User manual

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Get step-by-step help and info for your device.

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Device Help & How-To Guides - AT&T

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Activate and register the device via the web portal or mobile app.

Activate & Register

Learn how to connect using the AT&amp;T Cell Booster ethernet ports.

Connection Options

Device Location

Device Overview

Learn the device requirements of the AT&amp;T Cell Booster.

Device Requirements

Device Setup

Refer to AT&amp;T Cell Booster app/portal “Device Status” section to get troubleshooting tips for your Cell Booster.

LED Indicators

Learn how to navigate and use the Cell Booster mobile app.

Management Website

Learn how to troubleshoot connectivity issues by relocating the device.

Re-Locate Device

Determine your device&#39;s card type, operating frequencies, physical characteristics, storage, and more.

Specifications

Learn how to install the AT&amp;T Cell Booster behind a firewall, or behind a router with firewall capabilities.

Firewall & Router

Check your battery life, adjust sound, set up alerts, and more.

Learn how to perform a soft, factory, or alternate master reset of your device.

Reset Device

Update device software, check data use, and manage device memory with ease.

Learn how to troubleshoot dropped call by checking network connections and moving the device.

Dropped Calls

Learn how to troubleshoot a Flashing Orange “Internet” LED.

Flashing Orange “Internet” LED

The AT&amp;T Cell Booster has a maximum range of approximately 3,000 square feet. Device range will fluctuate based on walls and other obstructions. Actual range might be limited by factors such as building materials, obstructions, and connected device capability.

Limited Device Range

Learn how to troubleshoot if Cell Booster GPS cannot be acquired.

No GPS Connection

Learn how to troubleshoot issues related to your phone not connecting to the AT&amp;T Cell Booster. 

Phone Not Connecting

Learn how to troubleshoot issues related to poor voice quality.

Poor Voice Quality

Explore ways to resolve device issues or reset your device.

Device help

Having device issues?