Device help

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

Browse the Web

Access the web, access or edit bookmarks, access tabs, and access browser settings.

Backup & Restore with Computer

Backup and restore your device with a computer.

Backup & Restore with a Memory Card

Backup contacts, photos, and files to increase device memory or transfer to another device.

Optimize Battery Life

Manage battery consumption and view power-saving options.

Block or Unblock Calls

Block or unblock calls from your device.

Call Features

Learn what features are available while on an active call.

Call Forwarding

Manage call forwarding from your device.


Add, view, delete, and customize contacts by adding a picture or ringtone.

Enhanced Push-to-Talk

Use Enhanced Push-to-Talk (EPTT) to make and receive calls.

Airplane Mode

Turn Airplane mode on and off. Airplane mode will disable all wireless services on the device. Calls, data, and text messages cannot be sent or received. Disable Airplane mode to restore regular device function.


Turn Bluetooth on or off, scan and connect to other Bluetooth devices, and unpair a connected device.

Mobile Hotspot

Set up your device as a personal hotspot and share your data connection with Wi-Fi-capable devices.

Signal & Cellular Data

View cellular network signal, turn international roaming or your mobile data connection on or off.


How to connect to a Wi-Fi network.


Determine your device's SIM card type, operating frequencies, physical characteristics, storage, and more.

Device Setup

Set up your device for the first time or after a factory reset.

Gestures & Motion

Control your device by making specific movements with your hand.

Keyboard & Typing

Type, change T9 settings, and use Auto-complete.

Learn & Customize the Home Screen

Change the wallpaper and edit home screen shortcuts.

Phone Assembly

Install and remove the SIM card, microSD card, and battery.

Block or Unblock Messages

Block messages from your device.

Messaging Settings

Change text (SMS), picture (MMS), Advanced Messaging, wireless emergency (WEA), and AMBER alert settings.

Send & Receive Messages

Create and respond to text (SMS) and picture (MMS) messages, add, save, and view received attachments and more.


Access the calendar and manage events.

Access, Store Photos & Videos

Learn how to access and store Photos & Videos.

Camera & Video Settings

Manage camera and video settings including flash, timer, voice control, recording mode, storage location, and more.

Take a Picture or Video

Take and edit a picture or video, use the front and rear camera, and switch between camera and video modes.

Take a Screenshot

Take a screenshot.

Transfer Photos & Videos

Transfer photos and videos to or from your device and a computer.

Secure My Device

Lock or unlock your display, set a screen security lock type (star key or pin), get your PUK code, or request your device be unlocked from the AT&T network.


Turn on features such as TalkBack, flash notifications, and more. Accessibility features allow you to improve the usability of your device for users affected by impaired vision or hearing, cognitive difficulty, or reduced dexterity.

Date, Time & Alarm

Set the date and time and use the alarm clock.


Change the display brightness, screen time out, and font size.

Notifications & Alerts

Learn how to access and adjust notification settings, and turn notifications on or off.


Change volume settings and ringtones.

Available Memory

Check the available device storage, free up memory, and clear app data.

Find IMEI, Serial Number & Phone Number

View the device IMEI & phone numbers.

Software update for the Sonim XP3 (XP3800)

Learn how to update the software of the Sonim XP3 (XP3800).

Software Version

Determine your current device software version and check for updates.

View & Manage Data

Access Usage Manager to view data usage, set data limits, and see the apps using the most data.

Reset Device

Perform a soft, factory, and alternate master reset of the device.

Access Voicemail

Check your voicemail messages.

Change or Reset Voicemail Password

Reset a forgotten password or change an existing voicemail password.

Set Up Voicemail

Learn how to set up voicemail.

Having device issues?

Fix common service and device problems.