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

Management Website

Approved User List

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

Activate & Register

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

Device Requirements

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

Connection Options

Learn how to troubleshoot connectivity issues by relocating the device.

Re-Locate Device

Device Overview

Get tips on the best way to keep your device clean.

Learn How to Clean Your Device

Device Location

Device Setup

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

Specifications

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

LED Indicators

Device Settings

Learn how to install the AT&amp;T Cell Booster Pro 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

When your device has limited coverage in certain areas, try moving your device to improve your signal.

Limited Device Range

Learn how to troubleshoot if AT&amp;T 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 Pro.

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?