Device help
Get step-by-step help and info for your device.
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View cellular network signal, turn cellular data connection, international roaming, and mobile data connection on or off.
Determine your device's SIM card type, operating frequencies, and physical characteristics.
Learn How to Clean Your Device
Get tips on the best way to keep your device clean.
This article describes how to connect to the AT&T Network.
Set up your device for the first time or after a factory reset.
View network information, messages, and device information in the management website.
Access modem and router settings.
View and delete messages.
Find IMEI, Phone & Serial Number
View the device phone, serial, and IMEI number.
Software update for the AT&T Global Modem (USB800)
Learn how to update the software of the AT&T Global Modem (USB800).
Determine your current device software version and check for updates.
Access Usage Manager to view data usage, set data limits, and see the apps using the most data.
This article provides an overview of the LED states.
Troubleshoot limited or no connectivity on your device.
Perform a factory reset to restore default settings on the device. Perform a factory reset if you have been locked out of access to your device settings.